murmured
mur-mured
verb
Spoke very softly, often indistinctly, in a low, continuous tone.
"She murmured a quiet apology."
Thesaurus
Synonyms: murmur, heart murmur, cardiac murmur, murmuring, grumbling, mutter, grumble, muttering, murmuration, mussitation, croak, gnarl