| 必须 | bì xū | to have to; must; compulsory; necessarily |
| 必 | bì | certainly; must; will; necessarily |
| 必要 | bì yào | necessary; essential; indispensable; required |
| 必然 | bì rán | inevitable; certain; necessity |
| 不必 | bù bì | need not; does not have to |
| 必需 | bì xū | to need; to require; essential; indispensable |
| 必将 | bì jiāng | inevitably |
| 必定 | bì dìng | be bound to; be sure to |
| 何必 | hé bì | there is no need; why should |
| 不必要 | bù bì yào | needless; unnecessary |
| 必不可少 | bì bù kě shǎo | absolutely necessary; indispensable; essential |
| 务必 | wù bì | must; to need to; to be sure to |
| 必需品 | bì xū pǐn | necessity; essential (thing) |
| 必要性 | bì yào xìng | necessity |
| 必修课 | bì xiū kè | required course; compulsory course |
| 董必武 | Dǒng Bì wǔ | Dong Biwu (1886-1975), one of the founders of the Chinese communist party |
| 必得 | bì děi | must; have to |
| 必由之路 | bì yóu zhī lù | the road one must follow or take; the only way |
| 必修 | bì xiū | a required course |
| 势必 | shì bì | to be bound to; undoubtedly will |
| 未必 | wèi bì | not necessarily; maybe not |
三人行，
则必有我师 | sān rén xíng ,
zé bì yǒu wǒ shī | If three walk together, one of them can teach me sth (Confucius) |
三人行，
必有我师 | sān rén xíng ,
bì yǒu wǒ shī | lit. If three walk together, one should be my teacher (idiom, from Confucian analects). You have sth to learn from everyone.; also translated as: If three of us walk together, at least one of the other two is good enough to be my teacher. |
| 事必有兆 | shì bì yǒu zhào | future events always have an omen (idiom) |
| 事必躬亲 | shì bì gōng qīn | to attend to everything personally |
人无远虑，
必有近忧 | rén wú yuǎn lǜ ,
bì yǒu jìn yōu | He who gives no thought to far-flung problems soon finds suffering nearby (idiom, from Analects).; Smug concentration on the here and now will lead to future sorrow. |
两虎相争，
必有一伤 | liǎng hǔ xiāng zhēng ,
bì yǒu yī shāng | if two tigers fight, one must get injured (idiom); if you start a war, someone is bound to get hurt |
两虎相斗，
必有一伤 | liǎng hǔ xiāng dòu ,
bì yǒu yī shāng | When two tigers fight, one will get injured (idiom). If it comes to a fight, someone will get hurt. |
| 分秒必争 | fēn miǎo bì zhēng | seize every minute and second (idiom); not a minute to lose; every moment counts |
| 势在必得 | shì zài bì dé | to be determined to win (idiom) |
| 势在必行 | shì zài bì xíng | circumstances require action (idiom); absolutely necessary; imperative |
| 哀兵必胜 | āi bīng bì shèng | an army burning with righteous indignation is bound to win (idiom) |
| 多行不义必自毙 | duō xíng bù yì bì zì bì | persisting in evil brings about self-destruction (idiom) |
| 大可不必 | dà kě bù bì | need not; unnecessary |
工欲善其事，
必先利其器 | gōng yù shàn qí shì ,
bì xiān lì qí qì | To do a good job, an artisan needs the best tools (idiom). Good tools are prerequisite to the successful execution of a job |
| 必不可少组成 | bì bù kě shǎo zǔ chéng | absolute necessity; sine qua non |
| 必备 | bì bèi | essential |
| 必胜客 | Bì shèng Kè | Pizza Hut |
| 必和必拓 | Bì huó Bì tuò | BHP Billiton (Anglo-Australian mining corporation) |
| 必应 | Bì yìng | Bing (search engine) |
| 必死之症 | bì sǐ zhī zhèng | terminal illness; incurable condition (also fig.) |
| 必然结果 | bì rán jié guǒ | inevitable outcome; inescapable consequence |
| 必经 | bì jīng | must pass through |
| 必要条件 | bì yào tiáo jiàn | requirement; necessary condition (math) |
| 忽必烈 | Hū bì liè | Khubilai Khan (1215-1294), grandson of Genghis Khan 成吉思汗, first Yuan dynasty emperor, reigned 1260-1294 |
| 想必 | xiǎng bì | presumably; probably; in all likelihood; surely |
成功的男人后面必
有一个奉献的女人 | chéng gōng de nán rén hòu mian bì yǒu yī gè fèng xiàn de nǚ rén | Every successful man has a dedicated woman behind him (European proverb). |
| 早知今日何必当初 | zǎo zhī jīn rì hè bì dāng chū | if I (you, she, he...) had known it would come to this, I (you, she, he...) would not have acted thus (idiom); to regret vainly one's past behaviour |
智者千虑，
必有一失 | zhì zhě qiān lǜ ,
bì yǒu yī shī | lit. a wise person reflecting a thousand times can still make a mistake (idiom); fig. nobody is infallible |
有其师，
必有其徒 | yǒu qí shī ,
bì yǒu qí tú | as the teacher, so the pupil (idiom) |
