= unaccountable, adj. 2b. Obsolete. rare.

That cannot be taxed or charged with something.

= unresponsible, adj. 3. rare.

= irresponsible, adj.

Free from accountableness; irresponsible. Obsolete. rare.

Not responsible; not answerable for conduct or actions; not liable to be called to account; exempt from or incapable of legal responsibility. Also…

(un-, prefix1 affix 1b.)

Not liable to question; not responsible or accountable. Obsolete. rare.

Not responsible or accountable to any other person or thing; unaccountable.

Not liable to be called to account; irresponsible. Of persons, etc.

= irresponsible, adj. 1. rare.

Unable to answer; irresponsible.