Definition: the state of being tired Level: B2
他说是疲劳导致他犯了那个错误。
He said that it was ___tiredness that led him to make the mistake.
我突然被一阵疲劳袭来。
I was overtaken by a sudden wave of ___tiredness.
我感到如此放松，我的疲劳几乎完全消失了。
I felt so relaxed and my ___tiredness disappeared almost entirely.
