impregnable
Pronunciation
Adjective
C1 Advanced
Quick answer
Too strong to be captured, entered, or defeated.
Synonyms and antonyms
Synonyms
invincible
unassailable
Antonyms
Test yourself
Which word fits the gap? "The castle's thick walls made it seem _____ to attackers."
Answer: impregnable
In your own words, what does "impregnable" mean?
Too strong to be captured, entered, or defeated.
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