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Definition of impossible:

  1. An impossibility.
  2. Not possible; incapable of being done, of existing, etc.; unattainable in the nature of things, or by means at command; insuperably difficult under the circumstances; absurd or impracticable; not feasible.


incredible, possible, difficult, out of the question, unbelievable, objectionable, unworkable, frustrating, unimaginable, irritating, out, no-go, inconceivable, insupportable, hopeless, thorny, wayward, obscene, insurmountable, unacceptable, impassable, unthinkable, perverse, infuriating, with the best will in the world, unlikely, pain, exasperating, unendurable, insuperable, useless, testing, froward, unsufferable, be out of the question, vexing, impossibility, balky, attitude, critical, unmanageable, insufferable, improper, unrealizable, vain, pathetic, unaccepted, irritable, impracticable, contrary, hardly, something will not work/start/open etc., trying, contrarious, unfeasible, unachievable, unattainable, unsolvable, improbable, untenable, maddening, unbearable, intractable, intolerable, impractical, awkward, unsuitable, insoluble, ornery, undesirable, support, insolvable, infeasible, futile, undoable, possibly, annoying, offensive, obstinate, unsupportable, delicate, inaccessible, likely.

Usage examples:

  • It does seem impossible."

    - "An Artist in Crime", Rodrigues Ottolengui.
  • " I want to make it impossible," she cried.

    - "Love, The Fiddler", Lloyd Osbourne.
  • It seemed to me impossible.

    - "Camping & Tramping with Roosevelt", John Burroughs.