irresponsible

Từ điển WordNet v3.1 - WordNet Dictionary

adjective

showing lack of care for consequences (Freq. 2)
- behaved like an irresponsible idiot
- hasty and irresponsible action
• Ant:
responsible
• Similar to:
carefree, devil-may-care, freewheeling, happy-go-lucky, harum-scarum,
slaphappy, do-nothing, feckless, idle, loose, trigger-happy,
unaccountable, unreliable
• Derivationally related forms:
irresponsibleness, irresponsibility
• Attrubites:
responsibility, responsibleness