Synonyms of unsolvable

unsolvable

adjective

ˌən-ˈsäl-və-bəl 

as in impossible

incapable of being solved or accomplished

an apparently unsolvable problem

Synonyms & Similar Words

• impossible
• hopeless
• unlikely
• insoluble
• problematic
• insolvable
• futile
• insuperable
• unattainable
• impractical
• unrealizable
• undoable
• incredible
• useless
• absurd
• unworkable
• infeasible
• questionable
• impracticable
• unusable
• dubious
• improbable
• unfeasible
• inconceivable
• suspect
• debatable
• unthinkable
• suspicious
• unimaginable
• unbelievable
• implausible
• ridiculous
• disputable
• fishy
• shaky
• doubtful
• far-fetched
• shady
• outlandish
• preposterous
• doubtable
• fantastic

Antonyms & Near Antonyms

• possible
• feasible
• soluble
• workable
• practical
• achievable
• attainable
• useful
• applicable
• reasonable
• functional
• resolvable
• usable
• probable
• realizable
• working
• practicable
• doable
• serviceable
• likely
• acceptable
• plausible
• conceivable
• credible
• believable

Example Sentences

Recent Examples of unsolvable

Some of them will be only ameliorated or policed; others might be unsolvable in principle. — Joshua Rothman, New Yorker, 1 Aug. 2026

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