INSOLVABLE
insolvable, unsoluble, unsolvable, unresolvable
(adjective) not easily solved; “an apparantly insolvable problem”; “public finance...had long presented problems unsolvable or at least unsolved”- C.L.Jones
Source: WordNet® 3.1
Etymology
Adjective
insolvable (comparative more insolvable, superlative most insolvable)
Impossible to solve; insoluble.
Incapable of being paid or discharged.
Not capable of being loosed or disentangled; inextricable.
Synonyms
• (impossible to solve): See also incomprehensible
• (all senses): insoluble, unsolvable
Antonyms
• (impossible to solve): See also comprehensible
• (all senses): soluble, solvable
Source: Wiktionary
In*solv"a*ble, a.
1. Not solvable; insoluble; admitting no solution or explanation; as,
an insolvable problem or difficulty. I. Watts.
2. Incapable of being paid or discharged, as debts.
3. Not capable of being loosed or disentangled; inextricable. "Bands
insolvable." Pope.
Source: Webster’s Unabridged Dictionary 1913 Edition