fatigue

疲劳，劳累n[U]
tiredness
1.) Increasing numbers of people in high-powered jobs are suffering from fatigue and stress-related illness.
越来越多担任高职务的人感到劳累不堪，而且患有与压力有关的疾病。

（同情心）麻木（认为自己已做得足够，不愿再去帮助境况不如的人）
1.) After making donations for earthquake relief, famine relief and war relief, even the most generous donors are beginning to suffer compassion fatigue.
在先后为救济赈灾、饥荒和战争捐助之后，甚至最为慷慨的捐助者也变得麻木不仁了。

2.) (specialized) The crash was caused by mental fatigue (=repeated pressure in opposite directions) in one of the propeller blades.
坠机事件是由一个螺旋桨叶的金属疲劳造成的。