W: (adj) villainous [Related to: villain] (extremely wicked) "nefarious schemes"; "a villainous plot"; "a villainous band of thieves"
W: (adj) scoundrelly [Related to: scoundrel] (lacking principles or scruples) "the rascally rabble"; "the tyranny of a scoundrelly aristocracy" - W.M. Thackaray; "the captain was set adrift by his roguish crew"