Synonyms of impossible

impossible

adjective

(ˌ)im-ˈpä-sə-bəl 

as in unlikely

incapable of being solved or accomplished

the seemingly impossible problem of world hunger

fitting everything in my backpack seemed an impossible task

Synonyms & Similar Words

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

Antonyms & Near Antonyms

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

Examples of impossible in a Sentence

Recent Examples on the Web

But higher-dimensional algebraic varieties are far more complicated and impossible to visualize. —Jordana Cepelewicz, Quanta Magazine, 21 Oct. 2024

Many represented faces, bodies, and body parts, and dealt with how identities are often unstable, left open to change and frequently impossible to pin down altogether. —Alex Greenberger, ARTnews.com, 21 Oct. 2024

The hodgepodge of state voting systems makes a mass hacking impossible, and recent security upgrades have insured the preservation of paper backups for almost every ballot. —David D. Kirkpatrick, The New Yorker, 21 Oct. 2024

This can often feel impossible with the demands of work, family, and other urgent commitments. —Kyle J. Russell, USA TODAY, 20 Oct. 2024