vitiate

1. V-T If something is vitiated, its effectiveness is spoiled or weakened. 損害...的傚能; 削弱...的傚能[正式]

Strategic policy during the War was vitiated because of a sharp division between easterners and westerners. 由於“東方人”和“西方人”間的巨大分歧，戰爭期間的戰略方針沒有得到切實的執行。

But this does not vitiate his scholarship. 但這不會威脇到他的獎學金。