八九不离十

1. Basic Information

• Pinyin: bā jiǔ bù lí shí
• English Translation: Nine times out of ten (close to the mark / pretty much settled)
• Idiom Composition: 「八九」（Eight or nine; eighty to ninety percent; the vast majority）＋「不」（Not; negation）＋「离」（To depart from; to stray away from; far apart from）＋「十」（Ten; symbolizing completeness, the total, or the full reality）
• Meaning: A colloquial idiom meaning that an estimation, guess, or prediction is extremely close to the truth or actual facts, or that an event or plan is almost certain to turn out as anticipated. Literally, 'eight or nine is not far from ten.'

2. Detailed Meaning and Nuances

「八九不离十」 contains the following nuances:

• High Accuracy in Estimation: While it does not claim absolute 100% certainty, it indicates that a deduction or calculation is so close to the actual truth that any discrepancy is negligible. The phrasing 猜个八九不离十 (cāi gè bā jiǔ bù lí shí, to guess almost dead-on) is the most iconic example of this nuance.
• Colloquial and Approachable Tone: Unlike stiff, literary four-character idioms derived from classical texts, 八九不离十 (bā jiǔ bù lí shí) has five characters and originated as street vernacular. It carries an approachable, conversational warmth ideal for informal workplace chats and friendly dialogue.
• High Degree of Progress or Certainty: Beyond guessing facts, it is frequently placed at the end of a clause to communicate that an arrangement has consolidated and is on the verge of finalization (e.g., 'it's ninety percent locked in').

3. Usage

「八九不离十」 is mainly used in the following contexts:

• Deducing intentions or uncovering the truth: Used when reading between the lines, evaluating someone's expression, or piecing together circumstantial evidence to figure out what is really happening.
  • Example:「虽然他什么都没说，但看他的表情，我已经猜个八九不离十了。」
    （Even though he said nothing, judging by his expression, I have already guessed pretty much the whole story.)
• Confirming the likelihood or certainty of an outcome: Used to express that a project, deal, or plan has matured to the point where success or completion is nearly guaranteed.
  • Example:「这个项目我们谈了很久，现在基本上八九不离十了。」
    （We have been negotiating this project for a long time, and now it is basically as good as done.)
• Assessing the precision of an estimate: Used when comparing an initial forecast, budget, or calculation with actual results to highlight how remarkably accurate it was.
  • Example:「他对装修预算的估计很准，最后的花费和预算八九不离十。」
    （His renovation budget estimate was very accurate; the final cost was not far off at all from the projection.)

Additional Examples:

1. 听了他刚才的发言，大家心里对结果都有了个八九不离十的把握。
   （After hearing his remarks just now, everyone had a pretty good grasp of how things would turn out.）
2. 这件事虽然还没官宣，但看目前的动向，基本上八九不离十了。
   （Although this matter hasn't been officially announced, judging by current developments, it is almost certainly going to happen.）
3. 凭他多年的经验，看一眼病人的脸色就能猜出个八九不离十。
   （With his years of experience, he can hit remarkably close to the mark just by glancing at a patient's complexion.）
4. 这次考试能拿多少分，他自己心里已经八九不离十了。
   （As for what score he will get on this exam, he already has a pretty accurate estimate in mind.）

4. Cultural Background and Notes

• Colloquial Five-Character Structure: While the vast majority of Chinese idioms are four characters (成语, chéng yǔ) derived from classical antiquity, 八九不离十 (bā jiǔ bù lí shí) is a five-character folk idiom (俗语, sú yǔ). It gained literary recognition through modern realist authors such as Lao She (老舍), who celebrated everyday Beijing vernacular.
• Symbolism of Numbers: In Chinese cultural tradition, the number ten (十, shí) represents totality, perfection, and completeness—as reflected in the idiom 十全十美 (shí quán shí měi, completely perfect). Consequently, reach eight or nine (八九) means one is just a step away from complete certainty or wholeness; thus, 'not straying from ten' symbolizes negligible deviation.
• Distinction from 十有八九 (shí yǒu bā jiǔ): Learners should note the subtle difference between this idiom and 十有八九 (shí yǒu bā jiǔ). While 十有八九 (shí yǒu bā jiǔ) emphasizes pure probability ('the odds are nine to one that it will happen'), 八九不离十 (bā jiǔ bù lí shí) emphasizes proximity and accuracy ('the estimate is extremely close to the actual fact').

5. Similar and Opposite Idioms

• Similar Idioms:
  • 相差无几 (xiāng chà wú jǐ): Almost identical; differing only by an infinitesimal margin.
  • 十有八九 (shí yǒu bā jiǔ): Nine cases out of ten; overwhelmingly probable.link
• Opposite Idioms:
  • 大相径庭 (dà xiāng jìng tíng): Widely divergent; as different as can be.link
  • 天壤之别 (tiān rǎng zhī bié): A world of difference; a contrast as vast as heaven and earth.

6. Summary

八九不离十 (bā jiǔ bù lí shí) conveys that a guess or estimate is spot-on or that a situation is practically guaranteed. Originating from colloquial northern vernacular rather than classical literature, it is widely used in casual workplace discussions and daily conversations to convey strong confidence or high accuracy, often through common pairings like 猜个八九不离十 (cāi gè bā jiǔ bù lí shí, to guess almost correctly) or 基本上八九不离十了 (jī běn shàng bā jiǔ bù lí shí le, it's pretty much a done deal).