adjective
1.
lacking the power to speak
deaf and dumb from birth
Synonyms: inarticulate, mute, silent, speechless, unarticulate, voiceless; compare silent 2
Antonyms: articulate
2.
Synonyms: silent 2, mum, ||mumchance, mute, speechless, wordless
Related Word: incoherent, indistinct, maundering, tongue-tied
3.
Synonyms: silent 3, closemouthed, close-tongued, reticent, speechless, taciturn, tight-lipped, tight-mouthed, uncommunicative, wordless
Contrasted words: speaking, talking; talkative, verbose
4.
Synonyms: stupid 1, blockheaded, dense, doltish, dull, duncical, fatheaded, numskulled, thick, thick-witted
Idioms: dumb as an ox