impregnability 1
noundomain: state
Princeton WordNet [ver.3.1]
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EnglishDefinition
having the strength to withstand attack
Hypernym
safety 1
noun
the state of being certain that adverse effects will not be caused by some agent under defined conditions
EnglishDerivationally related form
impregnable 1
adjective
immune to attack; incapable of being tampered with
