susurrate

babble burble growl gurgle hum moan mumble mutter purr stammer utter whisper

buzz drip drone flow meander purl ripple rumble stutter tinkle trickle verbalize vocalize voice

speak clearly

be quiet

babble burble buzz drip drone flow growl gurgle hum meander moan mumble mutter purl purr ripple rumble sigh stammer stutter tinkle trickle utter verbalize vocalize voice whisper

be quiet speak clearly

buzz confide hiss mumble murmur mutter sigh

breathe gossip hint insinuate intimate sibilate tell

say softly say under one's breath speak confidentially spread rumor talk into someone's ear talk low tell a secret

speak clearly

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shout