Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun impregnability

1 sense of impregnability

Sense 1
invulnerability, impregnability -- (having the strength to withstand attack)
       => safety -- (the state of being certain that adverse effects will not be caused by some agent under defined conditions; "insure the safety of the children"; "the reciprocal of safety is risk")