Cách sử dụng
The word 'impregnable' is used to describe something that is very strong and cannot be easily defeated or broken. For example, a castle with high walls and strong defenses may be described as impregnable because it is almost impossible for enemies to conquer it. We can also use 'impregnable' to talk about a person's beliefs or opinions, indicating that they are very strong and cannot be changed easily. So, the word 'impregnable' is used when we want to describe something very strong and difficult to be overcome.