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English definition of “unaccountable”

unaccountable

adjective     /ˌʌnəˈkaʊntəbl/
SURPRISING impossible to explain: For some unaccountable reason, I've got three copies of the same book.Puzzle and confuseDifficult to understand
PERSON not having to give reasons for your actions or decisionsDuty, obligation and responsibility
unaccountably adverb
(Definition of unaccountable adjective from the Cambridge Learner's Dictionary © Cambridge University Press)

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