| 不得已 | bù dé yǐ | to act against one's will / to have no alternative but to / to have to / to have no choice / must |   |
| 氯已烯 | lu:4 yǐ xī | chloroethylene | |
| 迫不得已 | pò bù dé yǐ | to have no alternative (idiom) / compelled by circumstances / forced into sth | |
| 木已成舟 | mù yǐ chéng zhōu | lit. the timber has been turned into a boat already (idiom) / fig. what is done cannot be undone | |
| 不能自已 | bù néng zì yǐ | unable to control oneself / to be beside oneself | |
| 方兴未已 | fāng xīng wèi yǐ | flourishing and still in the ascendant (idiom) / rapidly expanding / still growing strong / on the up | |
| 米已成炊 | mǐ yǐ chéng chuī | lit. the rice has already been cooked (idiom) / fig. what is done cannot be undone | |
| 死而后已 | sǐ ér hòu yǐ | until death puts an end (idiom) / one's whole life / unto one's dying day | |
| 万不得已 | wàn bù dé yǐ | only when absolutely essential (idiom) / as a last resort | |
| 一夔已足 | yī kuí yǐ zú | one talented person is enough for the job (idiom) | |
| 有增无已 | yǒu zēng wú yǐ | constantly increasing without limit (idiom) / rapid progress in all directions | |
| 诛求无已 | zhū qiú wú yǐ | to make endless exorbitant demands | |
| 不为已甚 | bù wéi yǐ shèn | refrain from going to extremes in meting out punishment / not be too hard on subject | |
| 颤抖不已 | chàn dǒu bù yǐ | to shake like a leaf (idiom) | |
| 缠绵不已 | chán mián bù yǐ | to cling without letting go / to pester without end / to cling lovingly to each other | |
| 方寸已乱 | fāng cùn yǐ luàn | (idiom) confused / troubled / bewildered | |
| 悔之已晚 | huǐ zhī yǐ wǎn | too late to be sorry | |
| 仅此而已 | jǐn cǐ ér yǐ | that's all / just this and nothing more | |
| 惊叹不已 | jīng tàn bù yǐ | to exclaim in astonishment | |
| 命不久已 | mìng bù jiǔ yǐ | at death's door | |
| 难以自已 | nán yǐ zī yǐ | cannot control oneself (idiom) / to be beside oneself | |
| 难以自已 | nán yǐ zì yǐ | cannot control oneself (idiom) / to be beside oneself | |
| 年事已高 | nián shì yǐ gāo | old in years | |
| 年已蹉跎 | nián yǐ cuō tuó | the years have already gone by / to be too old | |
| 情非得已 | qíng fēi dé yǐ | compelled by the circumstances (to do sth) / (have) no other choice (but do sth) / (used as a pun in romance) can't help but fall in love | |
| 三氯已烷 | sān lu:4 yǐ wán | trichloroethane | |
| 三氯已烯 | sān lu:4 yǐ xī | trichloroethylene | |
| 事已至此 | shì yǐ zhì cǐ | see 事到如今[shi4 dao4 ru2 jin1] | |
| 寿数已尽 | shòu shù yǐ jǐn | to die (when one's predestined life span is up) | |
| 说说而已 | shuō shuō ér yǐ | nothing serious / just hot air | |
| 往事已矣 | wǎng shì yǐ yǐ | the past is dead (idiom) | |
| 为时已晚 | wéi shí yǐ wǎn | already too late | |
| 赞叹不已 | zàn tàn bù yǐ | to be full of praise (idiom) | |
| 洁净已装船 | jié jìng yǐ zhuāng chuán | clean on board | |
| 不得已而为之 | bù dé yǐ ér wéi zhī | to have no other choice / to be the last resort | |
| 甲氟膦酸叔已酯 | jiǎ fú lìn suān shū yǐ zhǐ | pinacolyl methylphosphonofluoridate | |
| 鞠躬尽瘁，死而后已 | jū gōng jìn cuì , sǐ ér hòu yǐ | to bend to a task and spare no effort unto one's dying day (idiom) / striving to the utmost one's whole life / with every breath in one's body, unto one's dying day | |
| 联合国系统已出版图书数据库 | | Books in Print of the United Nations System | |
yǐ