In an irresponsible manner; so as to be irresponsible.

(now rare) Not responsible; exempt from legal responsibility, not to be held accountable. / Lacking a sense of responsibility; performed or acting as though without responsibility; negligent.

Someone who is not responsible.

The character or state of being irresponsible; lack of or freedom from responsibility; want of accountability.

plural of irresponsible

That does not respond to stimuli; unresponsive.

plural of irresponsibility

The quality of being irresponsible.

The state of being irresponsive