adj. having an unpleasant sound; "as cacophonous as a henyard"- John McCarten

adj. not in agreement or harmony; "views discordant with present-day ideas"

adj. not having a musical sound or pleasing tune

adj. not compatible; "incompatible personalities"; "incompatible colors"

adj. not in harmony

adj. having a pleasant sound; "a euphonious trill of silver laughter"