Pembroke Castle was built to be invincible.
A superhero who cannot be killed is an example of someone who would be described as invincible.
Origin of invincibleMiddle English invyncyble from Middle French invincible from Classical Latin invincibilis: see in- and vincible
Origin of invincibleMiddle English from Old French from Latin invincibilis in- not ; see in- 1. vincibilis conquerable ; see vincible .
- in·vin′ci·bil′i·ty in·vin′ci·ble·ness
(usually uncountable, plural invincibles)
From Middle French invincible, from Latin invincibilis (“unconquerable”), from in- (“not”) + vincibilis (“conquerable”), from vincere (“to conquer”).