unfaithfulness unfaithfully • unfaked · · · Info · Definitions · Synonyms · Antonyms · Characters · · unfaithfulness · · Text Latin · · Script 14 · · Length Definitions · · · (noun) the quality of being unfaithful. Synonyms: infidelity. · · Noun Definition 1 Synonyms · · · infidelity · · Synonym 1 Antonyms · · · fidelity · · Antonym 0 faithfulness · · Antonym 1 Characters · · a latin small letter a U+0061 e latin small letter e U+0065 f latin small letter f U+0066 h latin small letter h U+0068 i latin small letter i U+0069 l latin small letter l U+006C n latin small letter n U+006E s latin small letter s U+0073 t latin small letter t U+0074 u latin small letter u U+0075