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

Powerful wind made a helicopter rescue impossible for a time. —Adam Tamburin, Axios, 27 Sep. 2024

This understandable reaction does indeed make the idea of switching careers impossible, much like the idea of waking up tomorrow morning and running a marathon seems impossible. —Phil Stark, The Hollywood Reporter, 26 Sep. 2024

The best lip crayons are one of the few products that are nearly impossible to mess up. —Jennifer Hussein, Allure, 26 Sep. 2024

For example, a lack of internet connectivity in some Indigenous communities makes the new EASE system impossible for many to access. —Christopher Lomahquahu and Eshaan Sarup, USA TODAY, 15 Sep. 2024