The quality or capacity to become tired or exhausted; the tendency of something to wear out under stress.
From 'fatigable' (capable of being fatigued) + '-ity' noun suffix. 'Fatigue' comes from French 'fatigue' (weariness), derived from Latin 'fatigare' (to weary). The '-ity' suffix converts the adjective into an abstract noun.
Material scientists use 'fatigability' to describe how quickly metals and materials break down under repeated stress—a bridge's fatigability tells engineers exactly how many trucks it can handle before its metal gets tired and cracks!
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