Impregnable is one of the many English words that bear a French ancestry. It derives from the Middle French verb prendre, which means "to take or capture." Combining prendre with various prefixes has given our language many other words, too, including surprise, reprise and enterprise.

What does impregnable fortress mean?

Impossible to capture or enter by force: an impregnable fortress.

What is the Bengali meaning of impregnable?

দুর্ভেদ্য adjective. an impregnable wall of solid sandstone. (of a fortified position) unable to be captured or broken into.