Unexplainable is a related term of unsolvable.
As adjectives the difference between unexplainable and unsolvable
is that unexplainable is that cannot be explained; inexplicable while unsolvable is not solvable.
unsolvable
English
Adjective
(
en adjective)
Not solvable.
Provably not solvable.
Synonyms
* insolvable
* difficult
Antonyms
* solvable
* easy