Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun impossible

1 sense of impossible

Sense 1
impossible -- (something that cannot be done; "his assignment verged on the impossible")
       => impossibility, impossible action -- (an alternative that is not available)

Antonyms of adj impossible

3 senses of impossible

Sense 1
impossible (vs. possible) -- (not capable of occurring or being accomplished or dealt with; "an impossible dream"; "an impossible situation")

possible (vs. impossible) -- (capable of happening or existing; "a breakthrough may be possible next year"; "anything is possible"; "warned of possible consequences")
        => accomplishable, achievable, doable, manageable, realizable -- (capable of existing or taking place or proving true; possible to do)
        => affirmable, assertable -- (capable of being affirmed or asserted; "a quality affirmable of every member of the family")
        => attainable, come-at-able -- (capable of being attained or accomplished; "choose an attainable goal"; "art is not something that is come-at-able by dint of study")
        => contingent -- (possible but not certain to occur; "they had to plan for contingent expenses")
        => feasible, executable, practicable, viable, workable -- (capable of being done with means at hand and circumstances as they are)
        => mathematical -- (statistically possible though highly improbable; "have a mathematical chance of making the playoffs")

Sense 2
impossible, inconceivable, out of the question, unimaginable -- (totally unlikely)

INDIRECT (VIA unthinkable) -> thinkable -- (capable of being conceived or imagined or considered)

Sense 3
impossible, insufferable, unacceptable, unsufferable -- (used of persons or their behavior; "impossible behavior"; "insufferable insolence")

INDIRECT (VIA intolerable) -> tolerable -- (capable of being borne or endured; "the climate is at least tolerable")

Similarity of adj impossible

3 senses of impossible

Sense 1
impossible (vs. possible) -- (not capable of occurring or being accomplished or dealt with; "an impossible dream"; "an impossible situation")
       => hopeless -- (certain to fail; "the situation is hopeless")
       => impracticable, infeasible, unfeasible, unworkable -- (not capable of being carried out or put into practice; "refloating the sunken ship proved impracticable because of its fragility"; "a suggested reform that was unfeasible in the prevailing circumstances")
       => out (predicate) -- (not worth considering as a possibility; "a picnic is out because of the weather")
       => unachievable, unattainable, undoable, unrealizable -- (impossible to achieve; "an unattainable goal")
          Also See-> hopeless#1; impractical#1; insurmountable#1, unsurmountable#1; unrealistic#1; unthinkable#1

Sense 2
impossible, inconceivable, out of the question, unimaginable -- (totally unlikely)
       => unthinkable (vs. thinkable) -- (incapable of being conceived or considered)

Sense 3
impossible, insufferable, unacceptable, unsufferable -- (used of persons or their behavior; "impossible behavior"; "insufferable insolence")
       => intolerable (vs. tolerable), unbearable, unendurable -- (incapable of being put up with; "an intolerable degree of sentimentality")