impair

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

In 2016, it was announced that Jones had been diagnosed with primary progressive aphasia, a form of dementia that impairs the ability to communicate.

To grow worse; to deteriorate.

Flesh may empaire,[…]but reason can repaire.

Not fit or appropriate; unsuitable.

giues he not till iudgement guide his bounty, / Nor dignifies an impaire thought with breath:

The act of impairing or deteriorating.

The fact of being impaired or having grown worse.

An impairment or deterioration.

Suppoſe a mans credit ſhould ſuffer an impair with thoſe whoſe cenſure is not to be valued; yet think, which is worſe, ſhame or ſin? Wilt thou ſin againſt God to ſave thy credit?