1. 损害：vitiable 能损坏的 | vitiate 损害 | vitiation 损害

2. 宣告无效,否定：Viking 海盗 | vitiate 宣告无效,否定 | aslant adj. 斜的

3. 使腐败;污染：vitellus 蛋黃;卵黃 | vitiate 使腐败;污染 | viticultural 种葡萄的;(用于)葡萄栽培的

4. 削弱,损害：viscous 粘滞的,粘性的 | vitiate 削弱,损害 | vitriolic 刻薄的,克刻的

1. 削弱…的效能;损害;使失效;使变质
If something is vitiated, its effectiveness is spoiled or weakened.

e.g. 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”之间存在巨大的分歧，战争期间的战略方针没有得到切实的执行。
e.g. But this does not vitiate his scholarship.
但这不会威胁到他的奖学金。

verb

1. take away the legal force of or render ineffective

e.g. invalidate a contract

Synonym: invalidatevoid

2. make imperfect

e.g. nothing marred her beauty

Synonym: marimpairspoildeflower

3. corrupt morally or by intemperance or sensuality

e.g. debauch the young people with wine and women
Socrates was accused of corrupting young men
Do school counselors subvert young children?
corrupt the morals

Synonym: corruptpervertsubvertdemoralizedemoralisedebauchdebaseprofanedepravemisdirect