to negate everything at one stroke; to dismiss all achievements with a single stroke; to write off completely
尽管他在这个项目中付出了很多努力，但一次小小的失误就被领导一笔抹杀了所有贡献。
Although he put a lot of effort into this project, a small mistake led the leader to dismiss all his contributions with a single stroke.
Next Idiom