inexplicable
1. [ adjective ] incapable of being explained or accounted for
Synonyms: incomprehensible
Examples:

"inexplicable errors" "left the house at three in the morning for inexplicable reasons"

Related terms: explicable cryptic paradoxical unexplained unaccountable incomprehensible insoluble unfathomable
Similar spelling:   inexpiable
  inseparable
  inexpugnable
  inexplicit
  inexpungeable
  inexplicitness
  inseparably
  inexpungible
  inexpressible