Deteriorate /(dē̇*tē"rĭ*ō̇*rāt)/

De·te·ri·o·rate

Deteriorate

v. t.

imp. & p. p. Deteriorated; p. pr. & vb. n. Deteriorating

  1. To make worse; to make inferior in quality or value; to impair; as, to deteriorate the mind.
    The art of war . . . was greatly deteriorated.

deteriorate

v. i.
  1. To grow worse; to be impaired in quality; to degenerate.
    Under such conditions, the mind rapidly deteriorates.