noun, noun or participle which takes 'suru', intransitive verb
fatigue; weariness; exhaustion
General physical or mental tiredness. Used as a noun or with する to mean 'become fatigued'.
長時間の運転で疲労がたまった。
Fatigue built up from driving for a long time.
彼
He is severely fatigued from overwork.
noun, noun or participle which takes 'suru', intransitive verb
metal fatigue
Technical term for material fatigue, especially in metals. Used in engineering contexts.
金属疲労が原因で橋が崩落した。
The bridge collapsed due to metal fatigue.