assibilation assibilate • Assidean · · · Info · Definitions · Synonyms · Characters · · assibilation · · Text Latin · · Script 12 · · Length Definitions · · · (noun) the development of a consonant phoneme into a sibilant. · · Noun Definition 1 (noun) pronunciation with a sibilant (hissing or whistling) sound. Synonyms: sibilation. · · Noun Definition 2 Synonyms · · · sibilation · · Synonym 1 Characters · · a latin small letter a U+0061 b latin small letter b U+0062 i latin small letter i U+0069 l latin small letter l U+006C n latin small letter n U+006E o latin small letter o U+006F s latin small letter s U+0073 t latin small letter t U+0074