/ ˌɪrɪˈspɒnsəbl; NAmE -ˈspɑːn-/ adjective
( disapproving ) ( of a person ) not thinking enough about the effects of what they do; not showing a feeling of responsibility :
an irresponsible teenager
an irresponsible attitude
It would be irresponsible to ignore the situation.
OPP responsible
► ir·re·spon·si·bil·ity / ˌɪrɪˌspɒnsəˈbɪləti; NAmE -ˌspɑːnsə-/ noun [ U ]
► ir·re·spon·sibly / -əbli; NAmE / adverb