Open English Wordnet
Verbs
(v)stultifyprove to be of unsound mind or demonstrate someone's incompetence“nobody is legally allowed to stultify himself” (v)stultifycause to appear foolish“He stultified himself by contradicting himself and being inconsistent” (v)cripple, stultifydeprive of strength or efficiency; make useless or worthless“This measure crippled our efforts”,
“Their behavior stultified the boss's hard work”