What is the meaning of Impair?

To weaken; to affect negatively; to have a diminishing effect on.

To grow worse; to deteriorate.

Not fit or appropriate; unsuitable.

The act of impairing or deteriorating.

The fact of being impaired or having grown worse.

An impairment or deterioration.

odd (not divisible by two)

odd

blunder

Source: wiktionary.org