fatigue
Fatigue is a lack of physical or mental energy. It’s when you feel tired or exhausted.
Fatigue is different from sleepiness:
- Sleepiness or drowsiness is feeling like you have to sleep. If you’re sleepy, you might be able to sleep if given the chance, or you may doze off by accident.
- You can feel fatigued but have difficulty falling asleep.
- Although sleepiness and fatigue are different, you can have both at the same time.
Synonyms:
tired, exhausted