Age

一生

yīshēng

(lifespan)

一輩子 /一辈子

yī bèizi

(lifespan)

世代

shìdài

(generation — see also generation)

壽命 /寿命

shòumìng

(lifespan)

年歲 /年岁

niánsuì

(amount of time since the birth of a being or the beginning of a thing)

年歲 /年岁

niánsuì

(one of the stages of life)

年紀 /年纪

niánjì

(amount of time since the birth of a being or the beginning of a thing)

年紀 /年纪

niánjì

(one of the stages of life)

年齡 /年龄

niánlíng

(amount of time since the birth of a being or the beginning of a thing)

年齡 /年龄

niánlíng

(one of the stages of life)

成人

chéngrén

(time of life at which one attains full personal rights and capacities)

成年

chéngnián

(time of life at which one attains full personal rights and capacities)

時代 /时代

shídài

(particular period of time in history)

晚年

wǎnnián

(state of being old; latter part of life)

期

qī

(geochronologic unit)

歲數 /岁数

suìshù

(one of the stages of life)

老年

lǎonián

(state of being old; latter part of life)

高齡 /高龄

gāolíng

(state of being old; latter part of life)

老化

lǎohuà

(intransitive: become old)