unsolvable

adjective

un·​solv·​able ˌən-ˈsäl-və-bəl 

-ˈsȯl-

: not able to be explained, answered for, or solved : not solvable

unsolvable disputes

an unsolvable mystery

unsolvably

ˌən-ˈsäl-və-blē 

-ˈsȯl-

adverb

an unsolvably difficult problem

Synonyms of unsolvable

• impossible
• hopeless

Examples of unsolvable in a Sentence

an apparently unsolvable problem

Recent Examples on the Web

The case underscores how advances in investigative genetic genealogy continue to solve decades-old mysteries once thought unsolvable, helping investigators identify victims who for years had no name. — Stepheny Price, FOXNews.com, 16 July 2026

Rather than identifying that the problem is unsolvable, models often engage in extended but ultimately fruitless reasoning loops in an attempt to answer the question. — Edd Gent, IEEE Spectrum, 8 July 2026

As America marks its 250th birthday, with so many of the country’s problems seeming unsolvable, Borchardt reminds us that impossible sometimes just means unfinished. — Maira Garcia, Los Angeles Times, 3 July 2026

The experience led him to question why one of the planet's most visible environmental problems was still largely accepted as unsolvable. — C.m. Rubin, Forbes.com, 1 July 2026

Word History

First Known Use

circa 1775, in the meaning defined above

Rhymes for unsolvable

• solvable
• irresolvable
• unresolvable
• resolvable