A low, confused, and indistinct sound, like that of running water.

To utter or give forth in low or indistinct words or sounds; as, to murmur tales.

Turbulent blood flow across a heart valve creating a "swishing" sound heard by astethoscope.

a characteristic sound (heard through a stethoscope) of blood flowing irregularly through the heart; can be harmless or may be an indication of disease

A complaint half suppressed, or uttered in a low, muttering voice.

To make a low continued noise, like the hum of bees, a stream of water, distant waves, or the wind in a forest.

To utter complaints in a low, half-articulated voice; to feel or express dissatisfaction or discontent; to grumble; -- often with at or against.

a complaint uttered in a low and indistinct tone