CYChengyu Dictionary

Chengyu meaning

防微杜渐 (fáng wēi dù jiàn)

prevent small problems from growing

Plain Answer

Source: Classical preventive-governance phrase in Chinese usage. Treated here as proverb image; read it first as a sentence-level judgment.

Core meaning: 防微杜渐 means prevent small problems from growing: Used when a small sign of trouble should be handled early before it develops into a larger risk.

Practice this meaning
Label
neutral / common formal
Best objects
risk prevention, classroom habit, meaning boundary
Do not use when
Do not use 防微杜渐 for a scene that only shares one surface word with the meaning. If the problem is closer to 亡羊补牢 or the contrast points toward 抱薪救火, choose that nearby entry instead of stretching this one.

Use: Use 防微杜渐 when the risk prevention sentence shows the object, cause, and tone clearly. Avoid: Avoid 防微杜渐 when the sentence only sounds related, lacks evidence, or needs a plainer word.

risk prevention发现流程里的小漏洞就要防微杜渐，不能等事故发生后才补救。Faxian liucheng li de xiao loudong jiu yao fang wei du jian, buneng deng shigu fasheng hou cai bujiu.When a small process gap appears, prevent it early instead of waiting for an incident and then repairing it.

Next: Read the examples, then compare 亡羊补牢 before practicing 防微杜渐 in the focused quiz.

Often studied with: 亡羊补牢, 步步为营, 掉以轻心

Read This First

防微杜渐 is introduced here through a proverb or image-based phrase with a learner-safe source boundary; the source label is Classical preventive-governance phrase in Chinese usage, and the page separates that background from modern sentence choice.

防微杜渐 means prevent small problems from growing. The important first reading is Used when a small sign of trouble should be handled early before it develops into a larger risk. This is a neutral phrase in normal use, so the sentence must show the judgment clearly.

Use 防微杜渐 when the object, cause, and tone match examples such as risk prevention, classroom habit, meaning boundary; then compare 亡羊补牢 and 步步为营 before writing your own sentence.

Avoid 防微杜渐 when the sentence only shares a broad topic, when the tone would be unfair to the person being described, or when a plainer word would be clearer than a chengyu.

Start with this cue: risk prevention plus a visible reason.

Meaning and Translation Notes

Used when a small sign of trouble should be handled early before it develops into a larger risk.

Literal meaning

guard against the tiny and block the gradual

  • 防微 / guard against small signs
  • 杜渐 / block gradual growth

English equivalents

  • prevent problems early near

    Use this when early signs of a problem can still be stopped before they grow.

  • nip trouble in the bud plain

    prevent problems early is plain, while nip trouble in the bud is idiomatic but slightly softer

  • stop risks before they grow plain

    This is safer when the audience needs the meaning without extra cultural explanation.

How To Use It

Use 防微杜渐 when the reader can see why prevent small problems from growing is the exact judgment, not just the topic. A strong sentence names the actor, the thing being judged, and the evidence that makes this idiom more precise than an ordinary adjective.

  • Use it when early signs of a problem can still be stopped before they grow.
  • The tone is cautious and preventive, so the surrounding sentence should make the judgment visible.
  • It works in risk prevention, classroom habit, meaning boundary contexts when the boundary is clear.

Common Mistakes

Do not use 防微杜渐 for a scene that only shares one surface word with the meaning. If the problem is closer to 亡羊补牢 or the contrast points toward 抱薪救火, choose that nearby entry instead of stretching this one.

  • Do not use it when there is no visible early sign, or the problem has already happened and repair is now the main task.
  • Do not choose it only because the English gloss "prevent problems early" feels close; compare wang-yang-bu-lao first.

Wrong Use Clinic

The most useful check is often the phrase you should reject.

  1. The learner wants to sound more idiomatic but has only a broad topic match for 防微杜渐.

    The sentence drops in 防微杜渐 without showing the cause, object, or tone that would make the idiom necessary.

    Fix: Rewrite the sentence so the evidence for prevent small problems from growing appears before or after the phrase.

    防微杜渐 fails in this case because a chengyu is not decoration; it must name the exact judgment the sentence is making.

    Compare wang yang bu lao

  2. The learner wants to say the opposite or a neighboring idea and chooses 防微杜渐 because it feels familiar.

    The sentence uses 防微杜渐, but the described situation points to a different cause, time point, or social attitude.

    Fix: Compare the sentence with 抱薪救火 and choose the phrase whose boundary explains the situation with less force.

    防微杜渐 becomes misleading when the nearby phrase would identify the real problem more cleanly.

    Compare bao xin jiu huo

  3. The learner has the right meaning area for 防微杜渐 but ignores register and emotional force.

    The sentence uses 防微杜渐 directly about a person, yet gives no softening context or evidence for such a cautious and preventive judgment.

    Fix: Add the observed behavior first, or choose 步步为营 if the sentence needs a gentler learning path.

    防微杜渐 can sound heavier than a short English gloss. The reader needs enough context to see why the tone is fair.

    Compare bu bu wei ying

  4. The learner remembers the origin image of 防微杜渐 but applies it to the wrong object.

    The sentence names an image or story detail, but the real object being judged would be better explained by another chengyu.

    Fix: Name the object first. If the object points toward 好逸恶劳, use that contrast instead.

    防微杜渐 should follow the judgment, not the most memorable image. Story memory is useful only when it supports the sentence-level decision.

    Compare hao yi wu lao

Chengyu Often Studied Together

Use these clusters to build sentence-level judgment instead of memorizing a single gloss.

  1. 防微杜渐 with nearby learner choices

    防微杜渐 is often studied beside 亡羊补牢 and 步步为营 because the words share a theme while asking the learner to judge a different cause, tone, or timing.

    老师先让学生解释防微杜渐，再比较亡羊补牢和步步为营，这样不会只凭英文近义词选答案。

    wang yang bu laobu bu wei ying

  2. 防微杜渐 with contrast checks

    防微杜渐 becomes easier to use when it is contrasted with 掉以轻心 and 抱薪救火; the contrast forces the writer to decide whether the sentence is praise, warning, correction, or neutral description.

    写作练习里先用防微杜渐造句，再换成掉以轻心，观察判断方向怎样改变。

    diao yi qing xinbao xin jiu huowang yang bu lao

  3. 防微杜渐 in example-building drills

    防微杜渐 should be practiced with 亡羊补牢 and 掉以轻心 because examples reveal whether the learner is choosing by meaning, tone, or only by a remembered image.

    课堂上先用防微杜渐写一个有证据的句子，再换成亡羊补牢或掉以轻心说明判断为什么改变。

    wang yang bu laodiao yi qing xinbu bu wei ying

  4. 防微杜渐 in story and source review

    防微杜渐 links best with 步步为营 and 抱薪救火 when the learner is checking whether a source image truly supports a modern sentence.

    复习出处时，不要只背防微杜渐的故事，还要比较步步为营，看哪个成语更能解释现代句子。

    bu bu wei yingbao xin jiu huowang yang bu lao

Learner Guide

Use these notes when deciding whether this chengyu fits a real sentence.

Use 防微杜渐 when early signs of a problem can still be stopped before they grow. This first test keeps the phrase from spreading across every nearby topic. Before using it, identify the speaker, the object being judged, and the reason a plain word would miss the Chinese nuance.

For English translation, prevent problems early is plain, while nip trouble in the bud is idiomatic but slightly softer. Do not choose an English phrase only because it sounds idiomatic. The translation should preserve tone, register, and the situation logic before it tries to sound compact.

The main misuse risk is when there is no visible early sign, or the problem has already happened and repair is now the main task. That boundary matters because chengyu often share a theme while judging different causes, time points, or social attitudes. A nearby phrase can be familiar and still be wrong.

Before using it in your own sentence, name the small sign, the likely gradual path, and the early action that prevents escalation. Then compare the sentence with wang-yang-bu-lao and bu-bu-wei-ying. If one nearby entry explains the situation with less force or more precision, choose that entry instead.

Before using 防微杜渐, write the plain English idea first. If the plain sentence already says everything naturally, the chengyu must add a sharper judgment, cultural image, or tone. If it does not add one of those, leave the plain wording alone.

A good 防微杜渐 sentence contains an object and evidence. The object is the person, plan, habit, result, or scene being judged. The evidence is the reason the phrase fits. Without both parts, the idiom may look learned but feel empty.

Compare 防微杜渐 with 亡羊补牢 and 抱薪救火 before finalizing a sentence. The goal is not to memorize synonyms; the goal is to reject the wrong phrase for a clear reason. That rejection is what turns recognition into usable knowledge.

When teaching or self-reviewing 防微杜渐, ask the learner to mark source, meaning, use case, wrong case, and one example. If any mark is missing, return to the entry section that supplies it rather than guessing from the headword alone.

risk prevention is the first test zone for 防微杜渐, but it is not the only possible use. Before using the phrase, name the speaker, the object being judged, and the nearest tested context: risk prevention, classroom habit, meaning boundary, usage boundary, misuse boundary, comparison check, context setup, teacher correction. Then choose among prevent problems early, nip trouble in the bud, stop risks before they grow as translation candidates and reject at least one candidate out loud. A useful final check is to compare the sentence with wang-yang-bu-lao and bu-bu-wei-ying; if one of those nearby entries explains the situation with less strain, the nearby phrase is the better learner choice.

When 防微杜渐 is translated as prevent problems early, the English should still preserve the phrase's tone. Keep cautious and preventive and the caution use area visible when the audience is still learning the idiom. If a short translation hides the warning "Do not use it when there is no visible early sign, or the problem has already happened and repair is now the main task.", choose a fuller English explanation instead. This matters because the strongest chengyu pages should help readers decide when not to use the most convenient English equivalent.

Example Sentences

Each example labels the situation so you can choose a natural English translation.

risk prevention

发现流程里的小漏洞就要防微杜渐，不能等事故发生后才补救。

Faxian liucheng li de xiao loudong jiu yao fang wei du jian, buneng deng shigu fasheng hou cai bujiu.

When a small process gap appears, prevent it early instead of waiting for an incident and then repairing it.

classroom habit

老师提醒学生及时改掉抄答案的习惯，是为了防微杜渐。

Laoshi tixing xuesheng jishi gaidiao chao da'an de xiguan, shi weile fang wei du jian.

The teacher corrects answer-copying early to stop a small habit from becoming a larger problem.

meaning boundary

防微杜渐强调早期预防，不是问题已经严重后的亡羊补牢。

Fang wei du jian qiangdiao zaoqi yufang, bushi wenti yijing yanzhong hou de wang yang bu lao.

防微杜渐 emphasizes early prevention, not repair after the damage has already become serious.

usage boundary

只有原因和语气都清楚时，这句话才适合用防微杜渐。

zhi you yuan yin he yu qi dou qing chu shi zhe ju hua cai shi he yong fang wei du jian

Only use 防微杜渐 when the cause and tone are both clear, not just because the topic feels nearby.

misuse boundary

如果只是普通情况，不要为了显得有文化而硬说防微杜渐。

ru guo zhi shi pu tong qing kuang bu yao wei le xian de you wen hua er ying shuo fang wei du jian

If the situation is ordinary, do not force 防微杜渐 just to make the sentence sound more cultured.

comparison check

比较近义成语以后，再决定这里是不是应该写防微杜渐。

bi jiao jin yi cheng yu yi hou zai jue ding zhe li shi bu shi ying gai xie fang wei du jian

After comparing nearby chengyu, decide whether 防微杜渐 is really the phrase the sentence needs.

context setup

这段话先说明对象和原因，所以防微杜渐读起来不突兀。

zhe duan hua xian shuo ming dui xiang he yuan yin suo yi fang wei du jian du qi lai bu tu wu

The passage names the object and cause first, so 防微杜渐 does not feel abrupt.

teacher correction

老师让学生先解释为什么不用别的词，再用防微杜渐造句。

lao shi rang xue sheng xian jie shi wei shen me bu yong bie de ci zai yong fang wei du jian zao ju

The teacher asks students to explain why another phrase would be wrong before writing a sentence with 防微杜渐.

Story and Cultural Context

防微杜渐 joins 微, a tiny sign, with 渐, gradual development. The phrase treats trouble as something that often grows by small stages, so the useful action is early prevention rather than dramatic later repair. Modern learners usually need the phrase as a decision tool. It tells them when a situation has crossed a specific boundary, not merely which English word looks similar. In the examples here, the phrase is tested against risk prevention, classroom habit, meaning boundary so the reader can see how the meaning changes with use. The safest reading is to keep the image, the tone, and the social situation together. 防微杜渐 joins 微, a tiny sign, with 渐, gradual development. The phrase treats trouble as something that often grows by small stages, so the useful action is early prevention rather than dramatic later repair. For English speakers, the useful memory is not only the literal image but the decision it makes possible. The examples test risk prevention, classroom habit, meaning boundary so the phrase remains tied to real use instead of becoming a decorative translation label. For this entry, the origin note is only the beginning of the explanation. The useful question is why 防微杜渐 survived as a portable judgment rather than as a decorative allusion. The image-based usage route gives the reader an image, but the modern sentence must still prove its own fit. A learner should ask three things: what concrete object is being judged, what evidence in the sentence supports that judgment, and what tone the phrase adds that a plain English adjective would not add. This is why the page tests 防微杜渐 through risk prevention, classroom habit, meaning boundary, usage boundary, misuse boundary; each context changes the pressure on the phrase and shows whether the idiom is acting as praise, warning, neutral description, or criticism. The story or usage background also has a translation boundary. 防微杜渐 can point toward prevent problems early, nip trouble in the bud, stop risks before they grow, but those English choices are not interchangeable. One version may preserve the image, another may sound natural in a classroom answer, and another may be safer in a workplace or essay sentence. The entry therefore treats public references as source cards, not as a paragraph order to imitate. Headword checks, story labels, and English equivalents are separated first; only after that are they rebuilt into the learner path used here: answer, label, examples, wrong-use clinic, comparison, story, and practice. The most common failure is overextension. Because 防微杜渐 has a memorable surface, learners may reach for it whenever a topic feels close. The better habit is to compare it with 亡羊补牢 and 步步为营 and with 抱薪救火 and 好逸恶劳 before writing. If the rejected phrase is hard to reject, the sentence probably has not supplied enough evidence. If the rejected phrase is easy to reject, the learner can explain the boundary and use 防微杜渐 with confidence. That is the practical purpose of the origin section: it turns cultural memory into a sentence-level decision instead of leaving the reader with a story and no next action.

Learning point: Small signals deserve attention before they become structural trouble.

Editorial Notes

These notes turn the entry into a decision path, not a loose definition.

First answer before details

防微杜渐 should first be read as a decision about prevent small problems from growing, not as a collectible story label. The image logic helps memory, but the reader's real task is to decide whether the modern sentence is making a neutral judgment with enough evidence. Start with the object being described, then ask what happened, who is being judged, and whether the tone is fair. If those details are missing, the idiom will feel like learned decoration rather than useful Chinese. This first-answer rule also helps teachers and translators: they can explain the phrase quickly before deciding whether a longer story, comparison, or correction block is needed.

Example clinic

The examples for 防微杜渐 deliberately cover risk prevention, classroom habit, meaning boundary, usage boundary, misuse boundary because a learner needs more than one successful sentence before the phrase becomes usable. Read the Chinese sentence, then explain in plain English why this phrase is more precise than a simple adjective or loose translation. A strong example names the context, shows the evidence, and makes the tone visible. A weak example merely places the chengyu near a related topic. This habit prevents a common error: remembering the literal image but forgetting the social judgment carried by the phrase. When the example feels forced, return to the meaning line and choose a plainer wording.

Comparison boundary

Before using 防微杜渐, compare it with 亡羊补牢 and 步步为营 and, when possible, with 抱薪救火 and 好逸恶劳. The comparison is not a synonym game. Nearby chengyu often share effort, caution, wisdom, or evaluation as a topic, while differing in cause, timing, and emotional force. A good learner sentence can explain why the rejected phrase fails. If that explanation is impossible, the chosen idiom is probably too loose. This is also the cleanest internal-link reason: the next page exists because it helps the reader reject a tempting but wrong choice. The comparison should leave a reusable rule, not merely another link to click.

Wrong-use trigger

防微杜渐 should be rejected when the sentence lacks an object, hides the reason for the judgment, or uses the idiom only because it sounds literary. The safest correction is to rewrite the sentence in plain English first, then add the chengyu only if it sharpens the meaning. If the tone becomes unfair, choose a gentler nearby phrase. If the source image is memorable but the modern object does not match, use the story only as background and do not force the idiom into the sentence. This wrong-use trigger is what keeps the entry from becoming a long but vague dictionary page.

Source synthesis note

防微杜渐 uses public references as checkpoints rather than as a structure to copy. One source may help with the headword, another with a story or image, and another with English translation range. The page then rebuilds those checks into its own learner order: short answer, label, examples, misuse, collocation, guide, story, and practice. This matters because a single-source paraphrase would give readers a familiar-looking article but not a better learning tool. The editorial value here is the decision path: what to use, what not to use, what to compare, and how to test the phrase in a new sentence.

Practice This Decision

Answer a focused quiz question, then come back to the examples and misuse clinic if the near phrase feels tempting.

Start focused quizReview mistakes first