— unaccountableness, unaccountability , n. — unaccountably , adv.
/un'euh kown"teuh beuhl/ , adj.
1. impossible to account for; unexplained; inexplicable: The boat has an unaccountable tendency to yaw.
2. exempt from being called to account; not answerable: As a subordinate, he is unaccountable for errors in policy.
[ 1635-45; UN- 1 + ACCOUNTABLE ]
Syn. 1. incomprehensible, inscrutable, mysterious, unintelligible. 2. unanswerable, irresponsible.