衰

不衰

bù shuāi

unfailing

光纤衰减

guāng xiān shuāi jiǎn

optical attenuation

再衰三竭

zài shuāi sān jié

weakening and close to exhaustion (idiom); in terminal decline

半衰期

bàn shuāi qī

(physics) half-life

唱衰

chàng shuāi

to express pessimistic views about (sth)

国势日衰

guó shì rì shuāi

national decline

年老力衰

nián lǎo lì shuāi

old and weak (idiom)

心力衰竭

xīn lì shuāi jié

heart failure

放射性衰变

fàng shè xìng shuāi biàn

radioactive decay

早衰

zǎo shuāi

to age prematurely

未老先衰

wèi lǎo xiān shuāi

to age prematurely

由盛转衰

yóu shèng zhuǎn shuāi

from prosperity to decline