1. (adj)unconquerable not capable of being conquered or vanquished or overcome Synonyms: insuperable Antonyms: vanquishable, surmountable, subduable, subjugable, beatable, conquerable, vincible
2. (adj)insuperable, unconquerable incapable of being surmounted or excelled Synonyms: insuperable, insurmountable, unconquerable Antonyms: conquerable, vanquishable, vincible, surmountable, beatable, subjugable, subduable