Synonyms of unaccountable in English:

unaccountable


See definition of unaccountable

adjective

1‘for some unaccountable reason, the horses drawing the cart stopped short’

SYNONYMS
inexplicable, unexplainable, insoluble, unsolvable, incomprehensible, beyond comprehension, beyond understanding, unfathomable, impenetrable, puzzling, perplexing, baffling, bewildering, mystifying, mysterious, arcane, inscrutable, peculiar, unusual, curious, strange, freak, freakish, unparalleled, queer, odd, bizarre, extraordinary, astonishing, obscure, abstruse, enigmatic
informal weird, fluky, freaky, spooky
British informal rum
North American informal off the wall, backasswards
archaic wildering

2‘the Council is literally unaccountable to anyone’

SYNONYMS
not responsible, unanswerable, not answerable, not liable
free, clear, exempt, immune
out of control, unsupervised
ANTONYMS

accountable, liable