FATIGUE

[noun] [U] [formal] - extreme tiredness, or (specialized) weakness in something such as a metal part or structure, often caused by repeated bendingIncreasing numbers of people in high-powered jobs are suffering from fatigue and stress-related illnesses.(humorous) If someone has compassion fatigue, they feel that they have done enough already, and do not want to do any more to help people in a worse situation than themselves.After making donations for earthquake relief, famine relief and war relief, even the most generous donors are beginning to suffer compassion fatigue.(specialized) The crash was caused by metal fatigue (= repeated pressure in opposite directions) in one of the propeller blades.