fatigue

Definitions

Extreme tiredness resulting from mental or physical exertion or illness.

The weakening of a material caused by repeatedly applied loads.

To cause someone to feel exhausted or weary.

Examples

After running the marathon, he suffered from extreme physical fatigue.

The pilot was grounded due to signs of mental fatigue and lack of sleep.

Metal fatigue can cause structural failure in aircraft wings over time.

Synonyms

exhaustion weariness tiredness lethargy lassitude fatiguedness enervation

Antonyms

energy vigor vitality stamina liveliness animation refreshment