[adjective] [disapproving] - not thinking carefully enough or not caring about what might result from actions takenIt is irresponsible to suggest that even a 10% drop in ozone levels is not a serious problem. [+ to infinitive]It would be irresponsible to ignore these warnings. [+ to infinitive]
IRRESPONSIBLE
Meaning of IRRESPONSIBLE in English
Cambridge English vocab. Кембриджский английский словарь. 2012