Invulnerable means unable to be hurt. Invulnerable to attack, feel invulnerable, nobody is invulnerable.
It is absolute, which is why it belongs to myth and to comic books more than to life — Achilles was invulnerable except at the heel, and the exception is the point of every such story. Applied to systems it means secure against attack, and no system is described as invulnerable by anybody who works on security. Note vulnerable; and that the Latin means unwoundable.
1adjectiveinvulnerableUnable to be hurt.
“When you're young, you feel invulnerable, as if nothing bad could ever happen to you.”
invulnerable is a quality of being unhurtable.
Latin invulnerabilis is in- plus vulnerabilis, from vulnus, a wound. Vulnerable and vulnerary come from the same wound.
Latin
invulnerābilis
Middle French
invulnérable
English, today
invulnerable
Built from
From Middle French invulnérable, from Latin invulnerābilis, from vulnerābilis, from vulnerō (“to wound”), from vulnus (“wound”), equivalent to in + vulnerable.
Etymology from Wiktionary, CC BY-SA