| Main Entry: | |
| Part of Speech: | adjective |
| Definition: | unable to speak |
| Synonyms: | aphasiac, aphasic, aphonic, muffled, mum, quiet, silenced, silent, speechless, tongue-tied, tongueless, unexpressed, unpronounced, unsounded, unspeaking, unspoken, voiceless, wordless |
| Antonyms: | articulate, speaking, vocal |
| Main Entry: | dampen |
| Part of Speech: | verb |
| Definition: | spoil spirits |
| Synonyms: | allay, check, chill, cloud, cool, curb, dash, deaden, deject, depress, diminish, discourage, dismay, dispirit, dull, humble, inhibit, moderate, muffle, mute, restrain, stifle |
| Antonyms: | brighten, encourage, hearten, inspirit, uplift |
| Main Entry: | deaden |
| Part of Speech: | verb |
| Definition: | diminish, muffle, quiet |
| Synonyms: | KO, abate, alleviate, anesthetize, benumb, blunt, check, chloroform, consume, cushion, damp, dampen, depress, deprive, desensitize, destroy, devitalize, dim, dope, drown, dull, etherize, exhaust, freeze, frustrate, gas, hush, impair, incapacitate, injure, knock out, lay out, lessen, mute, numb, paralyze, put out of order, put to sleep, quieten, reduce, repress, retard, slow, smother, soften, stifle, stun, stupefy, suppress, tire, tone down, unnerve, weaken |
| Antonyms: | animate, build, enliven, increase, strengthen |
| Main Entry: | debrief |
| Part of Speech: | verb |
| Definition: | silence |
| Synonyms: | censor, dummy up, gag, hold one's tongue, hush up, mute, muzzle, put the lid on, quash, say nothing, shut up, sit on, soft-pedal, squelch, stifle, suppress |
| Main Entry: | dumb |
| Part of Speech: | adjective |
| Definition: | unable to speak |
| Synonyms: | at a loss for words, inarticulate, incoherent, mousy, mum, mute, quiet, silent, soundless, speechless, tongue-tied, uncommunicative, voiceless, wordless |
| Antonyms: | speaking |
| Main Entry: | hollow |
| Part of Speech: | adjective |
| Definition: | deep, resonant in sound |
| Synonyms: | cavernous, clangorous, dull, echoing, flat, ghostly, low, muffled, mute, muted, resounding, reverberant, ringing, roaring, rumbling, sepulchral, sounding, thunderous, toneless, vibrant, vibrating |
| Antonyms: | high, light, soft |
| Main Entry: | hush |
| Part of Speech: | verb |
| Definition: | attempt to make quiet |
| Synonyms: | burke, choke, gag, muffle, mute, muzzle, quiet, quieten, shush, shut up, silence, stifle, still, stop, suppress |
| Antonyms: | yell |
| Main Entry: | inarticulate |
| Part of Speech: | adjective |
| Definition: | unable to speak well |
| Synonyms: | blurred, dumb, faltering, halting, hesitant, hesitating, inaudible, incoherent, incomprehensible, indistinct, maundering, muffled, mumbled, mumbling, mute, obscure, reticent, silent, speechless, stammering, tongue-tied, unclear, unintelligible, unspoken, unuttered, unvocal, unvoiced, vague, voiceless, wordless |
| Antonyms: | articulate, communicative |
| Main Entry: | inaudible |
| Part of Speech: | adjective |
| Definition: | silent |
| Synonyms: | closemouthed, faint, hushed, imperceptible, low, muffled, mum, mumbled, mute, muted, noiseless, nonvocal, not talkative, quiet, soundless, still, unclear, uncommunicative, unhearable, voiceless, wordless |