Synonyms:
cripple, stultify
Meaning: deprive of strength or efficiency; make useless or worthless; "This measure crippled our efforts"; "Their behavior stultified the boss's hard work"
Synonyms:
stultify
Meaning: cause to appear foolish; "He stultified himself by contradicting himself and being inconsistent"
Synonyms:
stultify
Meaning: prove to be of unsound mind or demonstrate someone's incompetence; "nobody is legally allowed to stultify himself"