The addition of -ity to an adjective results in a shift of stress to the antepenultimate syllable; that is, words in -ity are stressed on the last syllable before the -ity, even in cases where this syllable is part of another suffix (as in words in -ability and -icity).
adjective, dumber, dumbest. 1. lacking intelligence or good judgment; stupid; dull-witted. 2. lacking the power of speech (offensive when applied to humans): a dumb animal.
1)Inabilty to speak, Mute. 2)Lacking intelligence, stupid. That deaf dumb and blind kid sure plays a mean pinball --The Who. I cant believe you would test to see if that wire is live with your tounge. Man your Dumb. #stupid #mute #dum #unintelligent #idiot.