impregnable
unable to be captured, overcome, or broken through; completely secure
Word origin: From Old French imprenable, not able to be taken, from prendre, to take.
Impregnable in a sentence
Here are example sentences showing impregnable in a sentence.
The mountain fortress was considered impregnable by its defenders.
The medieval citadel was considered impregnable because its position atop sheer cliffs denied attackers any approach.
Using “impregnable” well
Impregnable describes a defense so strong it cannot be breached, and it extends figuratively to arguments or reputations that resist all challenge.
More GRE words starting with I
a person who attacks cherished beliefs or established institutions
attacking or undermining traditional beliefs and institutions
guided by ideals rather than by practical considerations
a peculiar habit or feature distinctive to an individual
excessively or blindly devoted to something or someone
extreme admiration or worship of someone or something, often to an excessive degree
to admire or revere someone to an excessive degree
charmingly peaceful and free of trouble
Questions about “impregnable”
Learn words the way the GRE tests them.
Vocabulary sticks when you meet it in real sentences. Practise these words inside text completion and sentence equivalence questions.