1Fatigue; tiredness or weariness of the body or mind resulting from prolonged activity or stress.
長時間の運転で強い疲労を感じた。
I felt strong fatigue after driving for a long time.
疲労をためないように休憩を取ってください。
Please take breaks so you don't accumulate fatigue.
慢性的な疲労には生活習慣の見直しが必要だ。
Chronic fatigue requires a review of lifestyle habits.
2Material fatigue (e.g., metal fatigue): damage or failure caused by repeated stress cycles in materials.
橋の点検で金属の疲労が見つかった。
Metal fatigue was found during the bridge inspection.
長年の使用で部品に疲労が蓄積した。
Years of use have accumulated fatigue in the parts.