stultify

动词 stultify:

1. prove to be of unsound mind or demonstrate someone's incompetence
2. cause to appear foolish
3. deprive of strength or efficiency; make useless or worthless
   同义词：cripple

1. Their unhelpfulness has stultified our efforts to improve things.
   他们不管事，我们为改进工作的用心也就白费了。