vitiate

1. V-T 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。

But this does not vitiate his scholarship. 但这不会威胁到他的奖学金。