- Sing - Sing lullaby - sing quietly - Sing softly - To make a continuous hollow moan, as cattle do when in
pain. - To hum or sing in a low tone; to murmur softly. - To sing in a low tone, as if to one's self; to hum.
- Distant traffic noise - Hum - Low, indistinct sound - Mutter in discontent - Quietly spoken utterance - Speak quietly - A low, confused, and indistinct sound, like that of
running water.
- After middle age, abdominal gurgling sound leads to bellyache - expression of discontent - Moan - Mutter in discontent - To murmur or mutter with discontent; to make
ill-natured complaints in a low voice and a surly manner. - To growl; to snarl in deep tones; as, a lion grumbling
over his prey. - To rumble; to make a low, harsh, and heavy sound; to
mutter; as, the distant thunder grumbles.
- Buzz - Continuous murmur in a hive of activity? - Low noise - Sing with closed lips - Sing without words - To make a low, prolonged sound, like that of a bee in
flight; to drone; to murmur; to buzz; as, a top hums. - To make a nasal sound, like that of the letter m prolonged,
without opening the mouth, or articulating; to mumble in monotonous
undertone; to drone.
- Bustle (about) - Fly low and fast - Hum - Phone call - Sound of bees - Vibrant atmosphere - To make a low, continuous, humming or sibilant sound, like
that made by bees with their wings. Hence: To utter a murmuring sound;
to speak with a low, humming voice.