Synonyms for


Similarity of adj impregnable

3 senses of impregnable

Sense 1:
impregnable, inviolable, secure, strong, unassailable, unattackable
invulnerable (vs. vulnerable)
Sense 2:
conceptive, impregnable
fertile (vs. sterile)
Sense 3:
impregnable, inexpugnable
unconquerable (vs. conquerable)
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