Synonyms: unaccountable, unexplainable
Definition: not to be accounted for or explained
Usage: perceptible only as unaccountable influences that hinder progress; an unexplainable fear
Similar words: inexplicable, incomprehensible
Definition: incapable of being explained or accounted for
Usage: inexplicable errors; left the house at three in the morning for inexplicable reasons
Synonyms: unaccountable
Definition: free from control or responsibility
Similar words: irresponsible
Definition: showing lack of care for consequences
Usage: behaved like an irresponsible idiot; hasty and irresponsible action