temporary loss of strength and energy resulting from hard
physical or mental work; "he was hospitalized for extreme fatigue"; "growing fatigue was apparent from the decline in the execution of their athletic skills"; "weariness overcame her after twelve hours and she fell asleep" Synonym(s):fatigue, weariness, tiredness
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
Tiredness \Tired"ness\, n.
The state of being tired, or weary.
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