ungratefulness ungratefully • ungrateful person · · · Info · Definitions · Synonyms · Characters · · ungratefulness · · Text Latin · · Script 14 · · Length 5 · · Syllables Definitions · · · (noun) a lack of gratitude. Synonyms: ingratitude. · · Noun Definition 1 Synonyms · · · ingratitude · · Synonym 1 Characters · · a latin small letter a U+0061 e latin small letter e U+0065 f latin small letter f U+0066 g latin small letter g U+0067 l latin small letter l U+006C n latin small letter n U+006E r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074 u latin small letter u U+0075