murmur

A low, indistinct, continuous sound.

An indistinct, whispered, or confidential complaint; a mutter.

An abnormal sound, usually emanating from the heart, that sometimes indicates a diseased condition.

To make a low, continuous, indistinct sound or succession of sounds.

To complain in low mumbling tones; grumble.

To say in a low indistinct voice; utter indistinctly.

To make a low continuous noise, like the sound of rushing water or of the wind among trees, or like the hum of bees.

To utter words indistinctly; mutter.

To grumble; complain; utter complaints in a low, muttering voice; hence, in general, to express complaint or discontent: with at or against.

Synonyms To repine, whimper.