irresponsible
adjective disapproving uk/ˌɪr.ɪˈspɒn.sə.bəl/ us/ˌɪr.əˈspɑːn.sə.bəl/
B2 不负责任的，无责任感的
not thinking enough or not worrying about the possible results of what you do
[ + to infinitive ] It would be irresponsible to ignore these warnings. 忽视这些警告是不负责任的。