to make black; darken.

to speak evil of; defame

to blacken a person's reputation.

to grow or become black.

verb

bleach , lighten , whiten , compliment , enhance , praise

verb

befoul , begrime , blot , cloud , deepen , ebonize , grow dark , grow dim , ink , make dark , shade , smudge , soil , asperse , attack , bad-mouth * , blotch , calumniate , decry , defame , defile , denigrate , dishonor , do a number on , give a black eye , knock * , libel , malign , rip * , rip up and down , slander , slur , stain , sully , taint , tarnish , traduce , vilify , besmirch , besoil , black , smutch , besmear , bespatter , dirty , smear , smut , spatter , darken , discolor , disgrace , soot , stigmatize , tar