That cannot be easily understood; completely obscure or mysterious; unfathomable; enigmatic
The definition of inexplicable is something that cannot be explained or something for which there is no logical answer or reason.
That cannot be dissolved; not soluble
not easily solved; ; - C.L.Jones
Find another word for unsolvable. In this page you can discover 10 synonyms, antonyms, idiomatic expressions, and related words for unsolvable, like: inscrutable, inexplicable, inextricable, insoluble, unexcogitable, insolvable, unsoluble, unresolvable, irresolvable and undecidable.