having a cruel, wicked, malicious nature or character.

of, pertaining to, or befitting a villain

villainous treachery.

outrageously base, wicked, or vile

a villainous attack on his character.

very objectionable or unpleasant; bad; wretched

a villainous storm.

adjective

atrocious , bad , corrupt , crooked , cruel , culpable , deplorable , depraved , diabolical , dirty , evil , felonious , hateful , ignoble , illegal , illicit , immoral , iniquitous , knavish , lawless , low , mean , nefarious , peccant , reprehensible , scandalous , shady * , sinful , unlawful , vile , wicked , degenerate , flagitious , miscreant , perverse , rotten , unhealthy , abominable , arrant , base , boorish , caddish , criminal , dastardly , despicable , detestable , disagreeable , horrible , unprincipled , vicious , vulgar , wretched