Another word for mumble
mutter, murmur, utter, whine, whimper, rumble, grumble, maunder, ramble on, whisper, speak indistinctly, speak inarticulately, swallow one's words*, hem and haw, slur one's speech, speak with mush in one's mouth*; see also mutter 1, stammer.
to mumble is to utter almost inaudible or inarticulate sounds in low tones, with the mouth nearly closed an old woman mumbling to herself; murmur implies a continuous flow of words or sounds in a low, indistinct voice and may apply to utterances of satisfaction or dissatisfaction to murmur a prayer; mutter usually suggests angry or discontented words or sounds of this kind to mutter curses
Another word for mumbleverb
To speak or utter indistinctly, as by lowering the voice or partially closing the mouth:murmur, mutter, whisper. See sounds