Greek to one, ambiguous, anaudic, aphasic, aphonic, bashful, beyond understanding, blurred, breathless, breathy, choked, choking, confused, conscious, coy, croaking, demure, digressive, discursive, disjointed, drawling, drawly, dumb, dumbfounded, dumbstricken, dumbstruck, dysphonic, faltering, garbled, guttural, halting, harsh, hawking, hesitating, hoarse, illogical, impenetrable, implicit, implied, incognizable, incoherent, incomprehensible, indistinct, inferred, inscrutable, irrational, jumbled, lisping, maundering, mispronounced, mixed-up, mousy, muddled, muffled, mum, mumbled, mumbling, mute, muzzy, nasal, numinous, past comprehension, quavering, rambling, scrambled, self-conscious, shaking, shaky, shamefaced, shamefast, shy, silent, skittish, snuffling, speechless, stammering, stifled, strangled, stricken dumb, thick, throaty, timid, timorous, tongue-tied, tongueless, tremulous, twangy, unclear, unconnected, undeclared, unexpressed, unfathomable, unintelligible, unknowable, unsaid, unsearchable, unspoken, unuttered, velar, voiceless, wild, wordless
aphony, aphonia, dumbness, obmutescence, absence of voice, want of voice, dysphony, cacoepy, silence, raucity, harsh voice &c, unmusical voice, falsetto, childish treble mute, dummy, aphonous, dumb, mute, deafmute, deaf and dumb, mum, tongue-tied, breathless, tongueless, voiceless, speechless, wordless, mute as a fish, mute as a stockfish, mute as a mackerel, silent, muzzled, inarticulate
, inaudible, croaking, raucous, hoarse, husky, dry, hollow, sepulchral, hoarse as a raven, rough, with bated breath, with the finger on the lips, sotto voce, in a low tone, in a cracked voice, in a broken voice, vox faucibus haesit.
stammering, inarticulateness, stammering, hesitation, impediment in one's speech, titubancy, traulism, whisper, lisp, drawl, tardiloquence, nasal tone, nasal accent, twang, falsetto, broken voice, broken accents, broken sentences, brogue, slip of the tongue, lapsus linouae, stammering, inarticulate
, guttural, nasal, tremulous, affected, sotto voce.