Unsolvable is a related term of mystifying.
As adjectives the difference between unsolvable and mystifying
is that unsolvable is not solvable while mystifying is unusual.
As a verb mystifying is
.
unsolvable
English
Adjective
(
en adjective)
Not solvable.
Provably not solvable.
Synonyms
* insolvable
* difficult
Antonyms
* solvable
* easy
mystifying
English
Adjective
(-)
unusual
Verb
(head)