invulnerable

US /ɪnˈvʌl.nɚ.ə.bəl/
UK /ɪnˈvʌl.nɚ.ə.bəl/
1.

bất khả xâm phạm

impossible to damage or hurt in any way:

:
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The command bunker is virtually invulnerable, even to a nuclear attack.