Adjective insuperable has 2 senses
  1. insuperable, insurmountable - impossible to surmount
    Antonym: conquerable (indirect, via unconquerable)
  2. insuperable, unconquerable - incapable of being surmounted or excelled; "insuperable odds"; "insuperable heroes"
    Antonym: surmountable (indirect, via insurmountable)
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