- 一生一世 yīshēngyīshì lifetimea whole lifetime; all one's life
- 不可一世 bùkěyīshì insufferably arrogant(idiom) to consider oneself unexcelled in the world; to be insufferably arrogant
- 乔治一世 Qiáozhì Yīshì George IGeorge I of Great Britain
- 二十一世纪 èrshíyīshìjì 21st century
- 人生一世，草木一春 rénshēngyīshì, cǎomùyīchūn transienceMan has but one life, grass but one spring (idiom); refers to the brevity of human existence.
- 第一世界 Dìyī Shìjiè First World
- 聪明一世，糊涂一时 cōngmingyīshì, hútuyīshí momentary lapseEven the wisest can have a momentary lapse in judgment; every man has a fool in his sleeve.