unaccountable
1. [ adjective ] not to be accounted for or explained
Synonyms: unexplainable
Examples:

"perceptible only as unaccountable influences that hinder progress" "an unexplainable fear"

Related terms: inexplicable
2. [ adjective ] free from control or responsibility
Related terms: irresponsible
Similar spelling:   unaccountably
  unsoundable
  unconsolable
  uncombable
  unconformable
  uncomfortable
  unconstrained
  uncomparable
  unconstraint
  unconcealed
  uncontrollable
  unconscionable
  uncomfortably
  unaccompanied
  uncontrolled
  unconstricted
  unconstipated