What is the synonym for the word fatigue?

'Fatigue' is defined as follows:
1) an unpleasant feeling of weakness or tiredness caused by working, stress or lack of sleep
2) menial work assigned to soldiers not engaged in war or training
3) the clothes worn by soldiers not engaged in war or training but performing menial work such as cleaning the barracks
4) the deterioration of a material, such as metal, when subjected to repeated or excessive stress