fatigue
word
Definition
A feeling of extreme tiredness or lack of energy, often caused by physical or mental work. In medicine, it can refer to a persistent state of exhaustion.
Usage & Nuances
'Fatigue' is slightly more formal and medical than 'tiredness'. Common in healthcare, sports, or technical contexts ('mental fatigue', 'muscle fatigue'). Not used as a verb in daily English. Distinct from temporary tiredness—often implies a deeper, ongoing exhaustion.
Example Sentences
After a long day, she felt strong fatigue.
basic
Exercise can sometimes cause muscle fatigue.
basic
Even after eight hours of sleep, he still felt a heavy fatigue.
natural
He was absent from work because of extreme fatigue.
basic
She could barely keep her eyes open from fatigue.
natural
The constant stress at work led to mental fatigue.
natural