| 亦即 | yì jí | namely; that is | |
| 不亦乐乎 | bù yì lè hū | lit. isn't that a joy? (quote from Confucius); fig. (jocularly) extremely; awfully | |
| 人云亦云HSK 6 | rén yún yì yún | to say what everyone says (idiom); to conform to what one perceives to be the majority view; to follow the herd | |
| 亦步亦趋 | yì bù yì qū | to blindly follow suit (idiom); to imitate slavishly; to do what everyone else is doing | |
| 反之亦然 | fǎn zhī yì rán | vice versa |