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| burble |
to make a soft bubbling sound or murmur. [2/3 definitions] |
| buzz |
a vibrating hum or murmur. [2/9 definitions] |
| coo |
to murmur affectionately or lovingly. [1/4 definitions] |
| murmur |
an irregularity in the heartbeat, caused by incomplete closure of heart valves; heart murmur. [1/6 definitions] |
| mutter |
to speak unclearly in a low tone; mumble; murmur. [1/4 definitions] |
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