impair

About 1.85 uses per million words.

Meaning

1. verb To weaken; to affect negatively; to have a diminishing effect on.
2. verb To grow worse; to deteriorate.
3. adjective Not fit or appropriate; unsuitable.
4. noun The act of impairing or deteriorating.
5. noun The fact of being impaired or having grown worse.
6. noun An impairment or deterioration.

Similar words

vitiate mar spoil deflower worsen deteriorate weaken debilitate degrade distort

Often followed by

the their its his or a our any your performance

Word family

impaired impairer impairers impairing impairs