vitiate fortify败坏
vitiate e削弱
vitiate a contract使契约失效
vitiate the air使空气混浊
vitiate or annul以下或者撤销
enfeeble enervate debilitate weaken vitiate使衰弱
Vitiate vi-ti-ate六次都提到吃饭
V-T（及物动词） If something is vitiated, its effectiveness is spoiled or weakened. 损害...的效能; 削弱...的效能 [正式]
Strategic policy during the War was vitiated because of a sharp division between easterners and westerners.
由于“东方人”和“西方人”间的巨大分歧，战争期间的战略方针没有得到切实的执行。