ADJ-GRADED 不知疲倦的;坚韧的 If you describe someone or their efforts as tireless, you approve of the fact that they put a lot of hard work into something, and refuse to give up or take a rest. 不知疲倦的;坚韧的 [approval]
He was a tireless worker for justice.
他是个为了正义不知疲倦地工作的人。
...Mother Teresa's tireless efforts to help the poor.