vitiate['viʃieit]vt.1.■污损；破坏；污染：Smoking vitiates the air.吸烟会污染空气。2.■使堕落，使腐化；败坏(道德等)：His spirit was vitiated by pleasure seeking.他的志气因追求吃喝玩乐而消磨殆尽。3.■使(契约等)无效，使失效：The contract was vitiated because one person signed under compulsion.该契约由于一人系被迫签字而无效。变形vt.vitiatedvitiating