Main Entry: dark·en

Pronunciation: \ˈdär-kən\

Function: verb

Inflected Form(s): dark·ened; dark·en·ing \ˈdär-kə-niŋ\

Date: 14th century

intransitive verb 1 : to grow dark : become obscured <the skies were darkening>
2 : to become gloomy <his mood darkened>transitive verb 1 : to make dark
2 : to make less clear : obscure <the financial crisis darkened the future of the company>
3 : taint, tarnish <darkened his reputation>
4 : to cast a gloom over
5 : to make of darker color

— dark·en·er \-kə-nər\ noun