2 entries under this word

Deteriorate

De-tē'ri-o-rāte, v. t.

verbtransitive

(89), v. t. [imp. & p. p. DETERIORATED; p. pr. & vb. n. DETERIORATING.] [Lat. deteriorare, deterioratum, from deterior, worse; Pr., Sp., & Pg. deteriorar, It. deteriorare, Fr. détériorer.] To make worse; to make inferior in quality.

De-tē'ri-o-rāte, v. i.

verbintransitive

(89), v. i. To grow worse; to be impaired in quality; to degenerate.

The art of war ... was greatly deteriorated. Southey.