[{"Bold_text": "noun", "List Items": ["a low, continuous sound, as of a brook, the wind, or trees, or of low, indistinct voices.Synonyms: mumble , susurration , grumble , mutter , complaint", "a mumbled or private expression of discontent.", "Also calledheart murmur.Medicine/Medical.an abnormal sound heard on listening to the heart, usually through a stethoscope, produced by the blood passing through deformed cardiac valves.in some persons a similar sound heard when blood passes through normal valves.", "an abnormal sound heard on listening to the heart, usually through a stethoscope, produced by the blood passing through deformed cardiac valves.", "in some persons a similar sound heard when blood passes through normal valves.", "Phonetics.a voice quality in which vibration of the vocal cords is accompanied by the escape of a great deal of air, as in the (h) ofahead;breathy voice."]}, {"Bold_text": "verb (used without object)", "List Items": ["to make a low or indistinct sound, especially continuously.", "to speak in a low tone or indistinctly.", "to complain in a low tone or in private.Synonyms: grouse"]}, {"Bold_text": "verb (used with object)", "List Items": ["to sound by murmurs.", "to utter in a low tone:He murmured a threat as he left the room."]}]