UNACCOUNTABLE

Source: 566, 567

unaccountable. Unaccountable, a. not explicable, strange, odd

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Un′ac‐count″a‐ble (?), a. 1. 1. Not accountable or responsible; free from control. South.
2. 2. Not to be accounted for; inexplicable; not consonant with reason or rule; strange; mysterious.
— Un′ac‐count″a‐ble‐ness}, n. — Un′ac‐count″a‐bly, adv.