impregnable
How to pronounce impregnable:
Synonyms for impregnable:
insurmountableunbeatableindomitablesecureunconquerableinsuperableuntouchableinvulnerableunstoppableundefeatedShow 5 more
Antonyms for impregnable:
nakedsurmountableassailablepoordoablebreakablesensitiveweaksusceptibleattainableShow 15 more
Other 4-syllable words like impregnable
Here are some other common words that have 4 syllables, like impregnable does.
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