| 异 | yì | different; other; hetero-; unusual; strange; surprising; to distinguish; to separate; to discriminate |
| 异常 | yì cháng | exceptional; abnormal; an anomaly |
| 异同 | yì tóng | comparison; differences and similarities |
| 异议 | yì yì | objection; dissent |
| 异性 | yì xìng | the opposite sex; of the opposite sex; heterosexual; different in nature |
| 异物 | yì wù | rarity; rare delicacy; foreign matter; alien body; the dead; ghost; monstrosity; alien life-form |
| 异样 | yì yàng | difference; peculiar |
| 异端 | yì duān | heresy |
| 异化作用 | yì huà zuò yòng | catabolism (biology); metabolic breaking down and waste disposal; dissimilation |
| 异口同声 | yì kǒu tóng shēng | different mouths, same voice; to speak in unison (idiom) |
| 异国 | yì guó | exotic; foreign |
| 异族 | yì zú | different tribe |
| 异化 | yì huà | alienation (philosophy); (of speech) dissimilation |
| 异乡 | yì xiāng | in a foreign land; away from home |
| 异步 | yì bù | asynchronous |
| 异己 | yì jǐ | dissident; alien; outsider |
| 异彩 | yì cǎi | extraordinary splendor |
| 异想天开 | yì xiǎng tiān kāi | to imagine the wildest thing; to indulge in fantasy |
| 异文 | yì wén | variant character; loan word; variant written form (for the same word); different edition |
| 异构体 | yì gòu tǐ | isomer |
| 异丁烷 | yì dīng wán | isobutane |
| 异丁苯丙酸 | Yì dīng běn bǐng suān | Ibuprofen or Nurofen; nonsteroidal anti-inflammatory drug (NSAID), trade names Advil, Motrin, Nuprin etc, used as analgesic and antipyretic, e.g. for arthritis sufferers; also called 布洛芬 |
| 异丙醇 | yì bǐng chún | isopropanol; isopropyl alcohol C3H8O |
| 异乎寻常 | yì hū xún cháng | unusual; extraordinary |
| 异事 | yì shì | sth else; a separate matter; not the same thing; with different jobs (not colleagues); a remarkable thing; sth special; an odd thing; sth strange or incomprehensible |
| 异亮氨酸 | yì liàng ān suān | isoleucine (Ile), an essential amino acid |
| 异人 | yì rén | eccentric; unusual person; talented individual |
| 异像 | yì xiàng | extraordinary image |
| 异卵 | yì luǎn | (of twins) fraternal; dizygotic |
| 异卵双胞胎 | yì luǎn shuāng bāo tāi | fraternal twins |
| 异咯嗪 | yì gē qín | isoalloxazine (name of organic chemical) |
| 异国他乡 | yì guó tā xiāng | foreign lands and places (idiom); living as expatriate |
| 异地恋 | yì dì liàn | long-distance romance; long-distance relationship |
| 异域 | yì yù | foreign country; alien land |
| 异形 | yì xíng | not the usual type; atypical; heterotype |
| 异形词 | yì xíng cí | variant spelling of the same Chinese word e.g. e.g. 笔划 and 笔画; exact synonym and homonym written with different characters |
| 异心 | yì xīn | different feelings; disloyalty; infidelity; malice |
| 异心坏心 | yì xīn huài xīn | vicious intention |
| 异性性接触 | yì xìng xìng jiē chù | heterosexual sex |
| 异性恋 | yì xìng liàn | heterosexuality; heterosexual love |
| 异性恋主义 | yì xìng liàn zhǔ yì | heterosexism |
| 异戊二烯 | yì wù èr xī | isoprene |
| 异戊橡胶 | yì wù xiàng jiāo | isoprene rubber |
| 异教 | yì jiào | heresy; heathenism |
| 异教徒 | yì jiào tú | member of another religion; heathen; pagan; heretic; apostate |
| 异文鄙事 | yì wén bǐ shì | strange writing by rustic or illiterate |
| 异步传输模式 | yì bù chuán shū mó shì | asynchronous transfer mode; ATM |
| 异母 | yì mǔ | sons of same father by different mother |
| 异源多倍体 | yì yuán duō bèi tǐ | allopolyploid (polyploid with chromosomes of different species) |
| 异焉 | yì yān | feeling surprised at sth |
