Антонимом so possible

impossible impracticable unattainable unfeasible undoable unreasonable unviable inconceivable unimaginable unthinkable improbable insolvable impervious insuperable ungettable unobtainable unsolvable illogical unworkable useless impractical irresolvable unrealizable insurmountable nonviable hopeless implausible irrealizable inexecutable unachievable unpractical futile infeasible irresoluble non-viable not possible not worth considering out of the question beyond the bounds of possibility unlikely unrealistic preposterous absurd inappropriate ridiculous incredulous dubious unplausible crazy unbelievable farfetched far-fetched insoluble intractable practical impassable inviable vain abstract nonpractical outlandish outrageous irrational inaccessible inapplicable unreal silly farcical unavailable unreachable unprocurable unachieveable wild out of reach outside your grasp unconceivable untenable not on questionable incredible suspect immaterial flimsy unconvincing obscure doubtful fishy uncompelling debatable fanciful fantastical fantastic cock-and-bull

actual concrete factual real confirmed definite effective exact specific true absolute indubitable clear unquestionable categorical undeniable authentic truthful substantive genuine substantial certain tangible attested precise veritable hard indisputable verified clear-cut existent

unlikely doubtful improbable questionable implausible dubious absurd inconceivable unrealistic not likely beyond belief far-fetched unbelievable incredible impossible unimaginable unreasonable unplausible unconvincing unthinkable unbelieveable unacceptable unreliable untenable incomprehensible remote unpromising helpless difficult illogical irrational deceptive irresponsible unsound dishonest undependable fabulous cock-and-bull

agreed concurred

ambitionless unambitious feckless apathetic complacent unmotivated unconcerned indifferent listless passionless uninterested uninvolved disinterested dispassionate lazy indolent impassive non-committal

inaccessible inconvenient unhandy unreachable untouchable remote unavailable unobtainable unattainable hidden secreted restricted limited ungettable unrealizable out-of-reach

impractical impracticable unrealistic unworkable useless blue-sky idealistic inapplicable nonpractical unusable utopian visionary impossible inefficient unpractical unsound decorative excited incapable inexperienced irrational unattainable unfeasible unlikely unproficient unreasonable unseasoned unserviceable unskilled untrained worthless

predictable certain definite designed essential impossible inevitable necessary planned real sure truthful unconditional same

only singular sole one solitary lone single one and only only possible solo

inadmissible banned barred forbidden impermissible interdicted prohibited proscribed verboten disallowed illegitimate inapplicable inappropriate intolerable irrelevant unacceptable unfair unjust unsuitable wrong

deterministic monolithic

unavailable inaccessible unobtainable unreachable absent impracticable inoperable limited missing nonexistent nonfunctional not available scarce unattainable unemployable unusable deficient in use lacking rare uncommon

genuine actual literal real authentic honest true dinkum sincere absolute creditable concreate valid bonafide unquestionable indisputable unfeigned legit unfaked credible legitimate indubitable veritable undisputed bona fide fair dinkum

compulsory essential mandatory necessary enforced obligatory required compulsatory requisite unavoidable incumbent inescapable forced nonvoluntary set imperative prescribed enforceable peremptory nonelective contractual statutory binding stipulated de rigueur

noncandidate

sopped sopped up soppier soppiest soppily soppiness soporous soporose soporifics soporifically soporific soporiferous