/ Thesaurus / I Synonyms of in a low voice Find synonyms for: Adverb1. sotto voce, in a low voiceusage: in an undertone; "he uttered a curse sotto voce"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language