| susurrate(verb, sound, low, utter, flow) |
| undercurrent(noun, hint, suggestion, trace, pull) |
| whispering(noun, sound, low, speech, talk) |
| breath(noun, hint, suggestion) |
| gripe(verb, criticize, protest, complain, grumble) |
| grouch(verb, protest, complain, grumble, moan) |
| jabber(noun, verb, talk, trivially) |
| repine(verb, criticize, protest, complain, fret) |
| sound(noun, verb, expression, produce, speech) |
| utter(verb, sound, low, express, talk) |
| cry(noun, verb, expression, sound, speech) |
| bubble(verb, river, foam, especially) |
| drip(verb, sound, low, flow, babble) |
| fuss(verb, criticize, protest, complain, grumble) |
| gabble |
| gossip(talk, hint, utter, chatter, buzz) |
| heart murmur(noun, expression, idiom) |
| hint(noun, verb, feeling, suggestion, trace) |
| hiss(verb, call, utter, ring, hum) |
| humming(noun, sound, low, buzz) |