suggestive of or tending to moral looseness; "lewd whisperings of a dirty old man"; "an indecent gesture"; "obscene telephone calls"; "salacious limericks"
completely lacking nobility in character or quality or purpose; "something cowardly and ignoble in his attitude"; "I think it a less evil that some criminals should escape than that the government should play an ignoble part"- Oliver Wendell Holmes, Jr.
not of the nobility; "of ignoble (or ungentle) birth"; "untitled civilians"
threatening or foreshadowing evil or tragic developments; "a baleful look"; "forbidding thunderclouds"; "his tone became menacing"; "ominous rumblings of discontent"; "sinister storm clouds"; "a sinister smile"; "his threatening behavior"; "ugly black clouds"; "the situation became ugly"
deadly or sinister; "the Florida eagles have a fierce baleful look"