Thesaurus

impregnable


impregnable

adjective

Definition of IMPREGNABLE

1
incapable of being defeated, overcome, or subdued <an impregnable fortress that had foiled one invader after another over the centuries>
2
impossible to get through or into <the castle's supposedly impregnable walls>
Synonyms impassable (also impassible), impermeable, impervious, impregnable

March 04, 2015
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