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Unable to be damaged or broken unless certain circumstances arise. He is invulnerable to insults because he his deaf. See invincible.

Antonyms: vulnerable mortal breakable soft flimsy breakable
Synonyms In-penetrable, fortified, unbreakable. Tough.
The flashing star in super mario world will temporarily make you invulnerable to attack.
by kyle.biddle November 29, 2010

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