/ ɪnˈvʌlnərəbl; NAmE / adjective
invulnerable (to sth) that cannot be harmed or defeated; safe :
to be in an invulnerable position
The submarine is invulnerable to attack while at sea.
OPP vulnerable
► in·vul·ner·abil·ity / ɪnˌvʌlnərəˈbɪləti; NAmE / noun [ U ]
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WORD ORIGIN
late 16th cent. (earlier than vulnerable ): from Latin invulnerabilis , from in- not + vulnerabilis (from vulnerare to wound, from vulnus wound).