D defs.my
Entry 4 senses · 4 variants Webster, 1913

Impair

/ĭmˌ-pĕr'/ · Im·pair · IPA /ɪmˈpɛɹ/
01 v. t. To make worse; to diminish in quantity, value, excellence, or strength; to deteriorate; as, to impair health, character, the mind, value.
imp. & p. p. Impaired; p. pr. & vb. n. Impairing
  1. 1.
    To make worse; to diminish in quantity, value, excellence, or strength; to deteriorate; as, to impair health, character, the mind, value.
    “Time sensibly all things impairs.” — Roscommon.
    “In years he seemed, but not impaired by years.” Pope.
02 v. t. To grow worse; to deteriorate.
  1. 1.
    To grow worse; to deteriorate.
03 a. Not fit or appropriate.
  1. 1.
    Not fit or appropriate.[Obs.]
04 n. Diminution; injury.
  1. 1.
    Diminution; injury.[Obs.]