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.
Dumb Terminal Definition. A dumb terminal is a computer terminal that consists mostly of just a display monitor and a keyboard (and perhaps a mouse as well). It has no internal CPU (central processing unit), and thus has little or no processing power. Likewise, there is no hard disk drive (HDD).