| Trad. | Simp. | Pinyin | English |
| 一 | yī | one; 1; single; a(n); (before verbs) "no sooner did VERB happen than..."; (before a noun) entire (family, etc.) | |
| 一巴掌 | yī bā zhǎng | spank | |
| 一把抓 | yī bǎ zhuā | (v) grab; snatch | |
| 一百 | yī bǎi | a hundred | |
| 一百二十六 | yī bǎi èr shí liù | 126 | |
| 一百五十多年 | yī bǎi wǔ shí duō nián | more than 150 years | |
| 一百五十億 | 一百五十亿 | yī bǎi wǔ shí yì | 15 billion |
| 一般人 | yī bān rén | average person | |
| 一般性 | yī bān xìng | (in) general (terms); generalized | |
| 一半 | yī bàn | half | |
| 一輩子 | 一辈子 | yī bèi zi | (for) a lifetime |
| 一臂之力 | yī bì zhī lì | (lend) a helping hand | |
| 一邊 | 一边 | yī biān | one side |
| 一部分 | yī bù fèn | portion | |
| 一側化 | 一侧化 | yī cè huà | lateralization |
| 一層 | 一层 | yī céng | layer |
| 一匙 | yī chí | spoonful | |
| 一觸即發 | 一触即发 | yī chù jí fā | could happen at any moment; on the verge |
| 一串 | yī chuàn | strand | |
| 一吹 | yī chuī | puff | |
| 一次 | yī cì | first; first time; once; (math.) linear (of degree one) | |
| 一次方程 | yī cì fāng chéng | linear equation | |
| 一打 | yī dǎ | dozen | |
| 一代 | yī dài | generation | |
| 一帶 | 一带 | yī dài | region; district |
| 一旦 | yī dàn | in case (something happens); once (something becomes true, then...); in one day | |
| 一刀兩斷 | 一刀两断 | yī dāo liǎng duàn | acting without dawdling in a straightforward manner; metaphor for severing relationship |
| 一道 | yī dào | together | |
| 一點 | 一点 | yī diǎn | a bit; a little |
| 一點點 | 一点点 | yī diǎn diǎn | (n) a little bit |
| 一點也不 | 一点也不 | yī diǎn yě bù | (adv) noways; nowise |
| 一點兒 | 一点儿 | yī dian3r | a bit; a little |
| 一丁不識 | 一丁不识 | yī dīng bù shí | illiterate, ignorant |
| 一定 | yī dìng | surely; certainly; necessarily; fixed; a certain (extent, etc.); given; particular | |
| 一定要 | yī dìng yào | must | |
| 一度 | yī dù | for a time; at one time; one time; once | |
| 一堆 | yī duī | pile | |
| 一對 | 一对 | yī duì | couple; pair |
| 一帆風順 | 一帆风顺 | yī fán fēng shùn | (saying) very smoothly; plain sailing |
| 一方面 | yī fāng miàn | one aspect is | |
| 一分錢 | 一分钱 | yī fēn qián | cent; penny |
| 一服 | yī fú | dose | |
| 一概 | yī gài | (adv) all without any exceptions | |
| 一概而論 | 一概而论 | yī gài ér lùn | (saying) lump different matters together |
| 一干二淨 | 一干二净 | yī gān èr jìng | (saying) thoroughly; completely |
| 一個 | 一个 | yī gè | a; an |
| 一個勁兒 | 一个劲儿 | yī gè jìn er | (adv) persistently; continues on |
| 一個數學家的辯白 | 一个数学家的辩白 | Yī gè shù xué jiā de biàn bái | A Mathematician's Apology |
| 一個中國政策 | 一个中国政策 | yī gè Zhōng guó zhèng cè | one China policy |
| 一貫 | 一贯 | yī guàn | consistent; constant |
| 一國兩制 | 一国两制 | yī guó liǎng zhì | one country, two systems (China-Hong Kong) |
| 一號 | 一号 | yī hào | first day of the month |
| 一哄而散 | yī hōng ér sàn | (saying) disperse in confusion | |
| 一會 | 一会 | yī huì | a moment, a while |
| 一會兒 | 一会儿 | yī huìr | a while |
| 一技之長 | 一技之长 | yī jì zhī cháng | (saying) skill or proficiency |
| 一家子 | yī jiā zi | a whole family | |
| 一角銀幣 | 一角银币 | yī jiǎo yín bì | dime |
| 一節詩 | 一节诗 | yī jié shī | stanza |
| 一九九七年 | yī jiǔ jiǔ qī nián | the year 1997 | |
| 一九四九年 | yī jiǔ sì jiǔ nián | the year 1949 (Communist revolution) | |
| 一局 | yī jú | inning | |
| 一舉 | 一举 | yī jǔ | (n) move; an act; an action; (adv) with one move; at one stroke |
| 一舉兩得 | 一举两得 | yī jǔ liǎng de | kill two birds with one stone |
| 一句 | yī jù | a line of verse; a sentence | |
| 一決雌雄 | 一决雌雄 | yī jué cí xióng | to have a show-down; to fight for mastery; to compete for a championship |
| 一口 | yī kǒu | readily; flatly (deny) | |
| 一口氣 | 一口气 | yī kǒu qì | one breath; in one breath |
| 一塊 | 一块 | yī kuài | piece |
| 一塊兒 | 一块儿 | yī kuài er | (adv) together; (n) at the same location |
| 一塊麵 | 一块面 | yī kuài miàn | loaf |
| 一連 | 一连 | yī lián | in a row; in succession; running |
| 一流 | yī liú | (n) front rank; top quality | |
| 一溜煙 | 一溜烟 | yī liù yān | in a flash, quickly |
| 一路順風 | 一路顺风 | yī lù shùn fēng | have a pleasant journey |
| 一律 | yī lǜ | (adj) same; uniform; (adj) all; without exception | |
| 一氯甲烷 | yī lǜ jiǎ wán | chloromethane | |
| 一輪 | 一轮 | yī lún | first round (of a match or election) |
| 一毛不拔 | yī máo bù bá | (saying) stingy; parsimonious | |
| 一面 | yī miàn | one side | |
| 一年半 | yī nián bàn | a year and a half | |
| 一年多 | yī nián duō | more than a year | |
| 一排 | yī pái | row | |
| 一旁 | yī páng | aside; to the side of | |
| 一匹馬 | 一匹马 | yī pǐ mǎ | one horse |
| 一篇 | yī piān | one-sided | |
| 一片 | yī piàn | piece; slice | |
| 一瞥 | yī piē | glance; glimpse | |
| 一齊 | 一齐 | yī qí | at the same time; simultaneously |
| 一起 | yī qǐ | together | |
| 一千 | yī qiān | one thousand | |
| 一千噸 | 一千吨 | yī qiān dūn | 1000 tons |
| 一千零五十億 | 一千零五十亿 | yī qiān líng wǔ shí yì | 105 billion |
| 一千零一夜 | Yī qiān líng yī yè | The Book of One Thousand and One Nights | |
| 一千七百萬 | 一千七百万 | yī qiān qī bǎi wàn | seventeen million |
| 一千四百二十九 | yī qiān sì bǎi èr shí jiǔ | 1429 | |
| 一切 | yī qiè | all; every; everything | |
| 一切事物 | yī qiè shì wù | everything | |
| 一群 | yī qún | gang; regiment | |
| 一身 | yī shēn | (n) the entire body; (meas) for wearing a suit | |
| 一身汗 | yī shēn hàn | sweating all over | |
| 一生 | yī shēng | all one's life; throughout one's life | |
| 一時 | 一时 | yī shí | temporary; momentary |
| 一手 | yī shǒu | (n) skill; (adv) all by oneself; without the help of others | |
| 一瞬間 | 一瞬间 | yī shùn jiān | (n) split second |
| 一套 | yī tào | suit; a set | |
| 一天 | yī tiān | one day | |
| 一同 | yī tóng | along; together | |
| 一頭 | 一头 | yī tóu | (adv) headlong; directly; (adv) rapidly; (adv) simultaneously |
| 一團 | 一团 | yī tuán | regiment |
| 一碗 | yī wǎn | bowl | |
| 一萬 | 一万 | yī wàn | ten thousand |
| 一無所有 | 一无所有 | yī wú suǒ yǒu | to have nothing; "The Dispossessed" |
| 一五一十 | yī wǔ yī shí | (narrate) systematically and in full detail; count by fives or tens | |
| 一系列 | yī xì liè | a series of; (adj) a collection of | |
| 一下 | yī xià | (adj) one time; once; (adv) in a short time; suddenly; all at once | |
| 一線 | 一线 | yī xiàn | frontline |
| 一線微光 | 一线微光 | yī xiàn wéi guāng | gleam |
| 一小部分 | yī xiǎo bù fen | a small part; a small section | |
| 一小時 | 一小时 | yī xiǎo shí | one hour |
| 一小時以後 | 一小时以后 | yī xiǎo shí yǐ hòu | a short time later |
| 一些 | yī xiē | some; a few; a little | |
| 一心 | yī xīn | wholeheartedly; heart and soul | |
| 一心一意 | yī xīn yī yì | intently | |
| 一行 | yī xíng | party; delegation | |
| 一氧化氮 | yī yǎng huà dàn | nitric oxide | |
| 一氧化碳 | yī yǎng huà tàn | carbon monoxide (CO) | |
| 一一 | yī yī | one by one; one after another | |
| 一意孤行 | yī yì gū xíng | (vi) dogmatize | |
| 一元論 | 一元论 | yī yuán lùn | monism |
| 一元酸 | yī yuán suān | monoprotic acid | |
| 一月 | yī yuè | first month; January | |
| 一再 | yī zài | repeatedly | |
| 一張 | 一张 | yī zhāng | sheet |
| 一陣 | 一阵 | yī zhèn | a burst; a fit; a peal |
| 一直 | yī zhí | continuously; always; from the beginning of ... up to ...; all along | |
| 一致 | yī zhì | unanimous; identical (views or opinions) | |
| 一擲千金 | 一掷千金 | yī zhì qiān jīn | Deal or No Deal |
| 一致性 | yī zhì xìng | consistency | |
| 一致性效應 | 一致性效应 | yī zhì xìng xiào yìng | consistency effect |
| 一致資源定址器 | 一致资源定址器 | yī zhì zī yuán dìng zhǐ qì | uniform resource locator (URL) |
| 一致字 | yī zhì zì | consistent phonogram(s) | |
| 一中一臺 | 一中一台 | yī zhōng yī tái | "one China, one Taiwan" (policy) |
| 一周 | yī zhōu | one week | |
| 一步 | yí bù | (single) step | |
| 一但 | yí dàn | if; in case; in a short time; once | |
| 一共 | yí gòng | altogether | |
| 一路平安 | yí lù píng ān | to have a pleasant journey; bon voyage | |
| 一秘 | yí mì | first secretary | |
| 一望無際 | 一望无际 | yí wàng wú jì | as far as the eye can see (lit: look afar no bound) |
| 一下子 | yí xià zi | in a short while; all at once; all of a sudden | |
| 一向 | yí xiàng | all along; the whole time; constantly; earlier; lately | |
| 一項 | 一项 | yí xiàng | an item; a thing |
| 一下兒 | 一下儿 | yí xiàr | a little bit; a little while |
| 一樣 | 一样 | yí yàng | same; like; equal to; the same as; just like |
| 一般 | yì bān | same; ordinary; common; general | |
| 一般來說 | 一般来说 | yì bān lái shuō | generally speaking |
| 一般原則 | 一般原则 | yì bān yuán zé | general principle |
Click on the pinyin to hear it pronounced. The simplified version is shown only if different from the traditional.
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