irresponsible

US /ˌɪr.əˈspɑːn.sə.bəl/
UK /ˌɪr.əˈspɑːn.sə.bəl/
"irresponsible" picture
1.

thiếu trách nhiệm

not thinking enough or not worrying about the possible results of what you do:

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It would be irresponsible to ignore these warnings.