insuperable

adjective in·su·per·a·ble \(ˌ)in-ˈsü-p(ə-)rə-bəl\

of a problem, difficulty, etc. : impossible to solve or get control of : impossible to overcome

Full Definition of INSUPERABLE

: incapable of being surmounted, overcome, passed over, or solved <insuperable difficulties>

— in·su·per·a·bly \-blē\ adverb

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Middle English, from Latin insuperabilis, from in- + superare to surmount, from super over — more at over

First Known Use: 14th century

Synonyms: bulletproof, impregnable, indomitable, invincible, insurmountable, invulnerable, unbeatable, unconquerable, unstoppable

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