in ‧ vul ‧ ne ‧ ra ‧ ble /ɪnˈvʌln ə rəb ə l/ BrE AmE adjective
someone or something that is invulnerable cannot be harmed or damaged if you attack or criticize them OPP vulnerable :
Gerry’s confidence made him feel invulnerable.
invulnerable to
We will not be satisfied until this city is safe and invulnerable to attack.
—invulnerability /ɪnˌvʌln ə rəˈbɪləti, ɪnˌvʌln ə rəˈbɪlɪti/ noun [uncountable]