Synonyms: inexplicable, incomprehensible
Definition: incapable of being explained or accounted for
Usage: inexplicable errors; left the house at three in the morning for inexplicable reasons
Similar words: inscrutable, mysterious, mystifying, cryptic, cryptical, deep
Definition: of an obscure nature
Usage: the new insurance policy is written without cryptic or mysterious terms; a deep dark secret; the inscrutable workings of Providence; in its mysterious past it encompasses all the dim origins of life- Rachel Carson; rituals totally mystifying to visitors from other lands
Similar words: paradoxical, self-contradictory
Definition: seemingly contradictory but nonetheless possibly true
Usage: it is paradoxical that standing is more tiring than walking
Similar words: unaccountable, unexplainable
Definition: not to be accounted for or explained
Usage: perceptible only as unaccountable influences that hinder progress; an unexplainable fear
Similar words: unexplained
Definition: having the reason or cause not made clear
Usage: an unexplained error