Synonyms: unresolvable
Definition: not capable of being resolved
Usage: unresolvable confusion
Similar words: inextricable
Definition: not permitting extrication; incapable of being disentangled or untied
Usage: an inextricable knot; inextricable unity
Synonyms: insolvable, unresolvable, unsoluble, unsolvable
Definition: not easily solved
Usage: an apparantly insolvable problem; public finance...had long presented problems unsolvable or at least unsolved- C.L.Jones
Similar words: insoluble
Definition: admitting of no solution or explanation
Usage: an insoluble doubt