unthoughtfulness unthoughtfully • unthoughtlike · · · Info · Definitions · Synonyms · Antonyms · Characters · · unthoughtfulness · · Text Latin · · Script 16 · · Length Definitions · · · (noun) the trait of not thinking carefully before acting. Synonyms: thoughtlessness. · · Noun Definition 1 Synonyms · · · thoughtlessness · · Synonym 1 Antonyms · · · thoughtfulness · · Antonym 0 Characters · · e latin small letter e U+0065 f latin small letter f U+0066 g latin small letter g U+0067 h latin small letter h U+0068 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 u latin small letter u U+0075