un·ac·count·a·ble
[ˌənəˈkoun(t)əb(ə)l]
ADJECTIVE
unable to be explained.
"a strange and unaccountable fact"
synonyms:
inexplicable · unexplainable
(of a person or their behavior) unpredictable and strange.
synonyms:
strange · unusual
(of a person, organization, or institution) not required or expected to justify actions or decisions; not responsible for results or consequences.
synonyms:
not responsible