murmuring
mur-mur-ing
noun
A low, continuous, indistinct sound, often from voices or nature.
"The murmuring of the crowd grew louder."
adjective
Making or characterised by a low, continuous, indistinct sound.
"A murmuring stream flowed gently past."
Thesaurus
Synonyms: susurrant, whispering, soft, murmur, murmuration, mutter, mussitation, muttering, grumbling, grumble