1. impossible to harm, damage, or defeat

Examples

• The fortress seemed invulnerable to enemy attacks.
• She felt invulnerable in her new armor.
• The superhero appeared invulnerable to bullets and explosions.
• His confidence made him feel invulnerable to criticism.
• The castle's thick walls made it nearly invulnerable.
• No system is completely invulnerable to cyber attacks.
• The champion boxer seemed invulnerable in the ring.