mumbler mumblement • mumbling · · · Info · Definitions · Synonyms · Characters · · mumbler · · Text Latin · · Script 7 · · Length Definitions · · · (noun) a person who speaks softly and indistinctly. Synonyms: mutterer, murmurer. · · Noun Definition 1 Synonyms · · · mutterer · · Synonym 1 murmurer · · Synonym 2 Characters · · b latin small letter b U+0062 e latin small letter e U+0065 l latin small letter l U+006C m latin small letter m U+006D r latin small letter r U+0072 u latin small letter u U+0075