irresponsibleness irresponsible • irresponsibly · · · Info · Definitions · Synonyms · Antonyms · Characters · · irresponsibleness · · Text Latin · · Script 17 · · Length Definitions · · · (noun) a form of untrustworthiness; the trait of lacking a sense of responsibility and not feeling accountable for your actions. Synonyms: irresponsibility. · · Noun Definition 1 Synonyms · · · irresponsibility · · Synonym 1 Antonyms · · · responsibility · · Antonym 0 responsibleness · · Antonym 1 Characters · · b latin small letter b U+0062 e latin small letter e U+0065 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 p latin small letter p U+0070 r latin small letter r U+0072 s latin small letter s U+0073