1.
fatigue, weariness, exhaustion
Physical or mental tiredness resulting from exertion or stress. A somewhat formal or technical term compared to the everyday 疲れ. Also used in medical and material science contexts (metal fatigue, etc.).
疲労が溜まっている。
Fatigue has been building up.
長時間の運転による疲労で事故が増えている。
Accidents are increasing due to fatigue from long hours of driving.
慢性的な疲労を感じている人は、生活習慣を見直すことが大切です。
For people experiencing chronic fatigue, it is important to review their lifestyle habits.
SIMILAR WORDS:
- 疲れ: tiredness — everyday, casual term
- 疲労: fatigue — more formal/technical, used in writing and medical contexts
USAGE:
Also functions as a する verb: 疲労する (to become fatigued). In technical contexts, 金属疲労 (metal fatigue) refers to the weakening of materials under repeated stress.
COMMON COLLOCATIONS:
- 疲労が溜まる: fatigue builds up
- 疲労を感じる: feel fatigue
- 疲労回復: fatigue recovery
- 慢性疲労: chronic fatigue
- 疲労骨折: stress fracture