The Collaborative International Dictionary
Villainous \Vil"lain*ous\, a. [Written also villanous.]
Base; vile; mean; depraved; as, a villainous person or wretch.
Proceeding from, or showing, extreme depravity; suited to a villain; as, a villainous action.
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Sorry; mean; mischievous; -- in a familiar sense. ``A villainous trick of thine eye.''
--Shak.Villainous judgment (O. E. Law), a judgment that casts reproach on the guilty person. [1913 Webster]
--- Vil"lain*ous*ly, adv. Vil"lain*ous*ness, n.
Wiktionary
a. In a villainous manner; in the manner of a villain; evilly.
Usage examples of "villainously".
The escorts collected: Viperous with damage to her bridge-superstructure, the old corvette minus one of her boats, Compass Rose intact but rolling villainously, the trawler riding well, the tug tossing about with a ludicrous, almost hysterical violence as she tried to keep pace with the rest.