Worsen

['wɜːs(ə)n] or ['wɝsn]

(verb.) grow worse; 'Conditions in the slum worsened'.

(verb.) make worse; 'This drug aggravates the pain'.

Typist: Owen--From WordNet

(v. t.) To make worse; to deteriorate; to impair.

(v. t.) To get the better of; to worst.

(v. i.) To grow or become worse.

Typed by Jewel

Typist: Wesley