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Showing results for impossible. Search instead for impossible/5.
Definitions

impossible

[im-pos-uh-buhl] / ɪmˈpɒs ə bəl /
ADJECTIVE
beyond the bounds of possibility
Synonyms
STRONGEST
absurd futile hopeless impassable impractical inaccessible inconceivable insurmountable preposterous unattainable unimaginable unreasonable unthinkable unworkable useless
STRONG
visionary
WEAK
beyond contrary to reason cureless hardly possible hundred-to-one impervious impracticable inexecutable infeasible irrealizable irreparable no-go no-win not a prayer out of the question too much unachievable uncorrectable unfeasible unobtainable unrecoverable way-out
Antonyms
STRONGEST
believable conceivable hopeful imaginable logical practical reasonable sensible
WEAK
achievable obtainable possible
ADJECTIVE
intolerable, ungovernable
Synonyms
STRONGEST
absurd hopeless ludicrous outrageous preposterous unacceptable unreasonable
STRONG
offensive undesirable
WEAK
egregious improper incongruous objectionable unanswerable unsuitable
Antonyms
STRONGEST
acceptable
STRONG
pleasing
WEAK
achievable believable governable manageable tenable tolerable

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

These processes are often difficult to explain and nearly impossible to challenge.

From Science Daily • Apr. 5, 2026

Grimes said it was almost impossible to see a micrometeorite with the naked eye.

From BBC • Apr. 4, 2026

Mangione's lawyers requested the delays because they argued the tight turnaround would make it impossible to prepare adequately for both.

From Barron's • Apr. 3, 2026

It’s impossible to predict which songs will gain traction, Day said, but she was very proud that one did.

From Los Angeles Times • Apr. 3, 2026

Beyond that bit about Clare disappearing, the claim that Deadwood would cause trouble for Fernlight was impossible.

From "The Undead Fox of Deadwood Forest" by Aubrey Hartman

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.