Invulnerable
adjective
Definition
1. (adjective) Impossible to harm, damage, or defeat — completely protected against any attack, threat, or danger.
Context Alive
You're fifteen years old and riding your bike down a steep hill with no helmet, wind in your face, and zero fear. You feel invulnerable — like nothing in the world could ever hurt you. Twenty years later you watch your own kid try the same thing and your heart nearly stops.
Meanings
1 meanings 1 Impossible to Harm or Defeat (Adjective) Common ▼
This meaning is about being completely safe from any form of attack, damage, or danger — either literally or as a feeling. Imagine a medieval knight in a story wearing enchanted armour that no sword can pierce — he is invulnerable in battle. This is describing total protection, whether real or imagined. You might say "no system is invulnerable to cyberattacks" to warn that even the best security can be broken, or someone could say "teenagers often feel invulnerable" to explain why young people take risks — they genuinely believe nothing bad will happen to them. Or think about a company so dominant in its market that competitors can't touch it — people might call it invulnerable, though history usually proves them wrong. The word can describe physical, emotional, or strategic protection — but it often carries a hint that the feeling of safety may be false.
✏️ Invulnerable is the opposite of vulnerable — the prefix in- reverses the meaning. Understanding vulnerable (open to harm) makes invulnerable (closed to harm) immediately clear. The word often appears in contexts where invulnerability is questioned or proven wrong: "he thought he was invulnerable, but..." The noun form is invulnerability, though it's rare. In comics and superhero stories, invulnerability is a classic superpower — Superman is the most famous example.
Common Patterns
Basic Structures
invulnerable to + noun (attack / criticism / harm) → protected against a specific type of threat or damage
No country's infrastructure is truly invulnerable to cyberattacks.
feel invulnerable → to believe — often incorrectly — that nothing can hurt you
Young drivers often feel invulnerable behind the wheel, which is why accident rates are so high.
seemingly / virtually invulnerable → appearing to be impossible to harm — but with room for doubt
The company looked virtually invulnerable until the scandal broke.
Common Structures
make someone/something invulnerable → to protect so thoroughly that harm becomes impossible
No amount of armour can make a soldier truly invulnerable.
prove invulnerable → to withstand every attack or challenge thrown at it
The castle's walls proved invulnerable during the three-month siege.
not invulnerable / far from invulnerable → used to remind people that something can in fact be harmed or defeated
The champion is talented, but she's far from invulnerable — she lost twice last season.
Collocations
10 collocationsinvulnerable to attack
impossible to harm through offensive action
feel invulnerable
to believe you are safe from all danger — often a false sense of security
virtually invulnerable
almost impossible to harm — but not quite guaranteed
invulnerable to criticism
unaffected by negative opinions or feedback
prove invulnerable
to successfully resist every threat or challenge
seemingly invulnerable
appearing to be untouchable — though the reality may differ
not invulnerable
a reminder that something can in fact be harmed or defeated
sense of invulnerability
a feeling — often unjustified — that nothing can go wrong
make invulnerable
to protect something so completely that damage becomes impossible
invulnerable position
a situation or stance that cannot be challenged or undermined
Example Sentences
10 examples
1
Teenagers often feel invulnerable — which is exactly why they take so many risks.
Young people frequently believe nothing can hurt them, which explains why they do such dangerous things.
2
No computer system is invulnerable to hacking — it's just a question of time and resources.
Every digital system can be broken into eventually — it only depends on how much effort and time someone puts in.
3
The fortress was considered invulnerable until a tunnel was dug beneath its walls.
Everyone believed the castle couldn't be taken — until attackers found a way underground.
4
He walked through the city at night as if he were invulnerable, completely unaware of the risks.
He wandered around after dark without a care, as though nothing bad could possibly happen to him.
5
The team's defence looked virtually invulnerable throughout the tournament.
Their defensive play was so strong that almost no opponent could break through.
6
She seemed emotionally invulnerable, but inside she was struggling more than anyone knew.
On the outside she appeared untouchable, but privately she was going through a much harder time than she let on.
7
The politician believed his popularity made him invulnerable — he was wrong.
He thought public support would protect him from any consequences — it didn't.
8
No leader is invulnerable to criticism, no matter how powerful they become.
Even the most powerful figures can be challenged and held accountable.
9
The new body armour makes soldiers more protected, but not invulnerable.
The upgraded armour improves safety significantly, but it doesn't make troops immune to harm.
10
Superman's invulnerability is what makes kryptonite such an important part of the story.
Because Superman can't normally be harmed, the one substance that weakens him becomes central to the plot.
Synonyms & Antonyms
6 items
Synonymsimmune
similar but often used for disease or legal protection — less dramatic than invulnerable
impervious
very close — unable to be affected or penetrated, often used for surfaces or emotions
indestructible
focuses specifically on being impossible to destroy — overlaps heavily with invulnerable
Antonymsvulnerable
the direct opposite — open to harm, attack, or criticism
exposed
unprotected and open to danger — lacking any defence
defenceless
completely without protection — unable to resist any threat at all