Main Entry: wors·en

Pronunciation: \ˈwər-s^ən\

Function: verb

Inflected Form(s): wors·ened; wors·en·ing \ˈwərs-niŋ, ˈwər-s^ən-iŋ\

Date: 13th century

transitive verb : to make worseintransitive verb : to become worse <the weather began to worsen>