villainous

Being or behaving like a villain.

Appropriate to or characteristic of a villain.

Highly unpleasant or annoying.

Pertaining to, befitting, or having the character of a villain, in any sense; especially, very wicked or depraved; extremely vile.

Proceeding from extreme wickedness or depravity: as, a villainous action.

Of things, very bad; dreadful; mean; vile; wretched.

In a vile manner or way; villainously.

Base; vile; mean; depraved.

Proceeding from, or showing, extreme depravity; suited to a villain.