undervoice

/ˈʌndə(ɹ)ˌvɔɪs/

undervoice means A low or quiet voice. Lexicurio rates it Sui generis — a strength score of 91 out of 100.

undervoice is pronounced /ˈʌndə(ɹ)ˌvɔɪs/.

Etymology

From under- + voice.

noun

A low or quiet voice.“Her sensations were indefinable, and so were they a few minutes afterwards upon hearing Henry Crawford, who had a chair between herself and Tom, ask the latter in an under voice whether there were any plan for resuming the play after the present happy interruption […]”

verb

To voice too weakly.“Consequently, the danger for Dutch learners of English is undervoicing the English lenis fricatives rather than the reverse.”
To make a quieter or background sound beneath.“Undervoicing the flame, there was the popping of hollow weed stalks, the tinkle of woody stems crisping and falling in coals.”