Webster's Revised Unabridged Dictionary · 1913

Invincible

Invincible , adjective

[Latin invincibilis: compare French invincible. See In- not, and Vincible.]

Incapable of being conquered, overcome, or subdued; unconquerable; insuperable; as, an invincible army, or obstacle.
Lead forth to battle these my sons Invincible. — Milton