fatigue
Word family adjectivefatigablefatigatenounfatigablenessfatigueadverbfatiguingly
fa·tigue /fəˈtiːɡ/ ●○○ noun 1 [uncountableU]TIRED very great tiredness 疲劳,疲乏,劳累 SYN exhaustionwith fatigue Sam’s face was grey with fatigue. 萨姆累得脸色灰白。
from fatigue He’s suffering from physical and mental fatigue. 他身心交瘁。
2 [uncountableU] technicalTBC a weakness in metal or wood, caused when it is bent or stretched many times, which is likely to make it break 〔金属或木头的〕疲劳 Origin fatigue (1600-1700) French Latin fatigare “to make tired”