/fəˈti:g ||; fəˈtig/noun [U]:
1 the feeling of being extremely tired 疲惫；疲劳: He was suffering from mental and physical fatigue. 他精神上和体力上都很劳累。
2 weakness in metals caused by a lot of use （金属的）疲劳: The plane crash was caused by metal fatigue in a wing. 飞机坠毁是一个机翼上金属疲劳所致。