irresponsible
🇺🇸
/ˌɪrɪˈspɑːnsəbl/
🇬🇧
/ˌɪrɪˈspɒnsəbl/
not careful about the results of your actions; not doing what you should do
Leaving children alone at home is irresponsible behavior.
將孩子獨自留在家中是不負責任的行為。