Meaning : Prove to be of unsound mind or demonstrate someone's incompetence.
Example :
Nobody is legally allowed to stultify himself.
Meaning : Cause to appear foolish.
Example :
He stultified himself by contradicting himself and being inconsistent.
Meaning : Deprive of strength or efficiency. Make useless or worthless.
Example :
This measure crippled our efforts.
Their behavior stultified the boss's hard work.
Synonyms : cripple