16 entries under impossibility topic. ×

0
beyond control(expression, idiom)
0
desperate
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impervious
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impracticable unachievable(expression, idiom)
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inaccessible
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inextricable
0
infeasible
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innavigable
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insuperable
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insurmountable
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out of reach(expression, idiom)
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self-contradictory
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uncomeatable
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unfeasible
0
unobtainable
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unsurmountable
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APASmart Define. (2015). had thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/had/thesaurus/synonyms
ChicagoSmart Define. 2015. "had thesaurus" https://smartdefine.org/had/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, had thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/had/thesaurus/synonyms>.
MLASmart Define. "had thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/had/thesaurus/synonyms>