impair [ɪmˈpeə(r)]

以下由轻松背单词网站提供

vt.损害，损伤；削弱，减少

to spoil something or make it weaker so that it is less effective

Loud noise can impair your hearing. 巨大的噪音有损听觉。
It can not impair the intellectual vigor of the young. 这不能磨灭青年人思想活力。