1fa·tigue 
/fəˈti:g/ noun
plural fa·tigues /fəˈti:g/ noun 1 [noncount] : the state of being very tired : extreme weariness
▪ We were overcome by fatigue after the long journey. ▪ The drug's side effects include headache and fatigue. 2 fatigues [plural] : the uniform that soldiers wear when they are doing physical work
▪ soldiers wearing combat boots and fatigues ▪ army/military fatigues 3 [noncount] technical : the tendency of a material (such as metal) to break after being bent or moved many times
▪ The cracks in the engine were caused by metal fatigue.
▪ We were overcome by fatigue after the long journey. ▪ The drug's side effects include headache and fatigue.
▪ soldiers wearing combat boots and fatigues ▪ army/military fatigues
▪ The cracks in the engine were caused by metal fatigue.
