To sing or utter in falsetto.
A person who sings in falsetto.
The "false" (singing) voice in any human, usually airy and lacking a purity of vowels; created by utilizing the next highest vocal folds above those used for speech and normal range singing. It is commonly confused with the head voice register.
To say (something) indistinctly, to mutter.
To speak or make low, indistinguishable noise; to mumble, mutter.
The sound made by any condition which produces noisy, or turbulent, flow of blood through the heart.
A muttered complaint or protest; the expression of dissatisfaction in a low muttering voice; any expression of complaint or discontent.
Soft indistinct speech.
Any low, indistinct sound, like that of running water.