Impregnable
Definition
Too strong to be broken into or defeated.
Example
"The castle was impregnable."
"Their defense was so strong, it seemed impregnable to the enemy."
"She built an impregnable argument that no one could challenge."
Explanation
Impregnable means something that cannot be broken into, passed through, or defeated. It is often used to describe strong buildings, walls, or defenses that are too powerful for enemies to attack successfully. For example, a castle with very thick walls and strong guards might be called impregnable because no one can get inside without permission. It can also be used in a non-physical way — like saying someone’s confidence or belief is impregnable, meaning nothing can shake it or change it. So, whether it’s a place or a person, it means completely strong and safe from harm or attack.