From ir- + responsible.

• (British) IPA: /ˌɪɹ.ɪˈspɒn.sə.bəl/
• (America) IPA: /ˌɪɹ.əˈspɑn.sə.bəl/
• (Australia) IPA: /ˌɪɹ.ɪˈspɔn.sə.bəl/, [ˌɪɹ.ɪˈspɔn.sə.bl̩]

irresponsible

1. (now, rare) Not responsible; exempt from legal responsibility, not to be held accountable.
   • 1790, Edmund Burke, Reflections on the Revolution in France, Oxford, published 2009, page 28:

     They left the crown what, in the eye and estimation of law, it had ever been, perfectly irresponsible.

2. Lacking a sense of responsibility; performed or acting as though without responsibility; negligent.

• French: irresponsable
• German: nicht verantwortlich
• Italian: irresponsabile
• Portuguese: irresponsável
• Russian: не нести
• Spanish: irresponsable

• French: irresponsable
• German: verantwortungslos, unverantwortlich
• Italian: irresponsabile
• Portuguese: irresponsável
• Russian: безотве́тственный
• Spanish: irresponsable

irresponsible (plural irresponsibles)

1. Someone who is not responsible.