stultify

1.使显得愚蠢;愚弄;使自相矛盾;(由于其后的矛盾行为)使归于无效;【法】声明(某人)精神错乱

1.to dull somebody's interest by being repetitive, tedious, and boring

2.to cause somebody or something to seem unintelligent or silly

3.to render something useless or ineffectual

4.to show or allege somebody to be not legally responsible because of a psychiatric disorder or instability