疲勞,疲倦
Tiredness \Tired"ness\, n. The state of being tired, or weary.
tiredness n : 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" [syn: {fatigue}, {weariness}]