faithlessness faithlessly • faithwise · · · Info · Definitions · Synonyms · Characters · · faithlessness · · Text Latin · · Script 13 · · Length Definitions · · · (noun) unfaithfulness by virtue of being unreliable or treacherous. Synonyms: falseness, fickleness, inconstancy. · · Noun Definition 1 Synonyms · · · falseness · · Synonym 1 fickleness · · Synonym 2 inconstancy · · Synonym 3 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