How to pronounce “impregnable” in English

It's a seaborne empire.which is kind of largely impregnable.

so few of their fellow physicians might have encountered the disorders.The magnetism of vivid health has overcome conservative barriers that were impregnable to every other force.' The empirical evidence of cycling's health value

It's a seaborne empire.But the problem is, there's a bit that's not impregnable, which is the hinge where the Maginot Line ends and it sort