dumb
(dated) Unable to speak; lacking power of speech (''kept in "deaf, dumb, and blind"'').
(archaic) Not talkative; taciturn or unwilling to speak.
(dated) Having no input or voice in running things.
(of things, actions, etc.) Unaccompanied by words or speech, silent, wordless.
(dated) Not producing any sound, silent.
(especially of a person) Stupid.
(figuratively) Pointless, foolish, lacking intellectual content or value.
Lacking some functionality or property ordinarily characteristic of its kind.
(technology, nonsmart) (technology) Not equipped with intelligent behavior or processing capabilities of its own.
(rare) Lacking brightness or clearness as a colour; dim, dull.
(dated) To silence.
To make stupid.
To represent as stupid.
To reduce the intellectual demands of.
(dated) {{n-g|An intensifier expressing contempt}}; damn, damned.