impossible

noun

An impossibility.

A skateboard trick consisting of a backflip performed in midair.

adjective

Not possible; not able to be done or happen.

(colloquial, of a person) Very difficult to deal with.

(mathematics, dated) imaginary

Roots

inim- · Latin · not possum-poss · Latin · be able

Synonyms for impossible

inconceivableadj unachievableadj unimaginableadj impracticableadj infeasibleadj unfeasibleadj unacceptableadj unrealizableadj impracticaladj unattainableadj unthinkableadj unobtainableadj unworkableadj possibleadj untenableadj

Synonyms & related words for impossible

Find synonyms, related words, and the definition of impossible — including inconceivable, unachievable, unimaginable, impracticable, infeasible, unfeasible. Dendril is a free visual thesaurus that shows them on an interactive map where stronger matches sit closer to the center — no signup, no ads.

Words related to impossible

Explore words related to impossible — words associated with it, words that go with it, and its nearest matches in meaning. Related words include impracticably, impossibly, impossibility, inconceivability, improbable, unlikely, unimplementable, difficult. Click any word to make it the center of the map and keep exploring the web of connections.

Synonyms for impossible

Common synonyms for impossible include inconceivable, unachievable, unimaginable, impracticable, infeasible, unfeasible, unacceptable, unrealizable — words that share a close meaning. Hover or tap any word on the map for its definition and part of speech.

Where does impossible come from?

The word impossible breaks down into 2 roots of Latin origin: im-, from Latin in (“not”); and -poss, from Latin possum (“be able”). Explore each root to see other English words built from the same source.