adj
invulnerable
adj
1
Impossible to harm, damage, or injure.
"No system is completely invulnerable to hackers."
"The ancient fortress seemed invulnerable to attack."
How to Use Invulnerable
Learner’s notesIn plain EnglishUnable to be hurt or damaged.
Easily confused with
Common pairings
invulnerable to attack
feel invulnerable
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No system is completely _____ to hackers.
Etymology
From Latin invulnerabilis, "unable to be wounded" (in-, "not," + vulnerare, "to wound," from vulnus, "wound").