| 一 | yī | one; 1; single; a (article); as soon as; entire; whole; all; throughout; "one" radical in Chinese characters (Kangxi radical 1) |
| 一定 | yī dìng | surely; certainly; necessarily; fixed; a certain (extent etc); given; particular; must |
| 一些 | yī xiē | some; a few; a little |
| 第一 | dì yī | first; number one |
| 一切 | yī qiè | everything; every; all |
| 一次 | yī cì | first; first time; once; (math.) linear (of degree one) |
| 统一 | tǒng yī | to unify; to unite; to integrate |
| 一起 | yī qǐ | in the same place; together; with; altogether (in total) |
| 一下 | yī xià | (used after a verb) give it a go; to do (sth for a bit to give it a try); one time; once; in a while; all of a sudden; all at once |
| 同一 | tóng yī | identical; the same |
| 一直 | yī zhí | straight (in a straight line); continuously; always; from the beginning of... up to...; all along |
| 一面 | yī miàn | one side; one aspect; simultaneously... (and...); one's whole face |
| 一致 | yī zhì | unanimous; identical (views or opinions) |
| 一天 | yī tiān | one day |
| 一边 | yī biān | one side; either side; on the one hand; on the other hand; doing while |
| 不一 | bù yī | to vary; to differ |
| 一时 | yī shí | a period of time; a while; for a short while; temporary; momentary; at the same time |
| 一片 | yī piàn | piece; slice |
| 一系列 | yī xì liè | a series of; a string of |
| 一带 | yī dài | region; district |
| 一部分 | yī bù fèn | portion; part of; subset |
| 唯一 | wéi yī | only; sole |
| 一阵 | yī zhèn | a burst; a fit; a peal; a spell (period of time) |
| 十一月 | shí yī yuè | November; eleventh month (of the lunar year) |
| 一道 | yī dào | together |
| 万一 | wàn yī | just in case; if by any chance; contingency |
| 一路 | yī lù | the whole journey; all the way; going the same way; going in the same direction; of the same kind |
| 一律 | yī lǜ | same; uniformly; all; without exception |
| 一旦 | yī dàn | in case (sth happens); if; once (sth happens, then...); when; in a short time; in one day |
| 一手 | yī shǒu | a skill; mastery of a trade; by oneself; without outside help |
| 一句话 | yī jù huà | in a word; in short |
| 一贯 | yī guàn | consistent; constant; from start to finish; all along; persistent |
| 一来 | yī lái | on one hand,... |
| 一口 | yī kǒu | readily; flatly (deny, admit and so on); a mouthful; a bite |
| 其一 | qí yī | one of the given (options etc); the first; firstly |
| 一生 | yī shēng | all one's life; throughout one's life |
| 一向 | yī xiàng | always (previously); a period of time in the recent past |
| 一头 | yī tóu | one head; a head full of sth; one end (of a stick); one side; headlong; directly; rapidly; simultaneously |
| 一度 | yī dù | for a time; at one time; one time; once |
| 一再 | yī zài | repeatedly |
| 大一 | dà yī | first-year university student |
| 一同 | yī tóng | along; together |
| 一等 | yī děng | first class; grade A |
| 一连 | yī lián | in a row; in succession; running |
| 一共 | yī gòng | altogether |
| 一齐 | yī qí | at the same time; simultaneously |
| 一口气 | yī kǒu qì | one breath; in one breath; at a stretch |
| 一身 | yī shēn | whole body; from head to toe; single person; a suit of clothes |
| 统一战线 | tǒng yī zhàn xiàn | united front |
| 一辈子 | yī bèi zi | (for) a lifetime |
