2ADJ-GRADED 坚韧的;不屈不挠的 Someone who is relentless is determined to do something and refuses to give up, even if what they are doing is unpleasant or cruel. 坚韧的;不屈不挠的
Relentless in his pursuit of quality, his technical ability was remarkable.
对质量孜孜不倦的追求使他的技能出类拔萃。
He was the most relentless enemy I have ever known.