unpenetrated

the fortress remained unpenetrated after weeks of siege.

the jungle terrain proved unpenetrated by modern machinery.

his privacy remained unpenetrated despite the media's relentless efforts.

the ancient code remained unpenetrated by generations of cryptographers.

the unpenetrated market represents a tremendous opportunity for expansion.

the mystery surrounding the disappearance remained unpenetrated for centuries.

the company's digital defenses stayed unpenetrated during the sophisticated cyberattack.

the massive unpenetrated iceberg posed an unseen danger to navigation.

her unwavering spirit remained unpenetrated by harsh criticism and setbacks.

the unpenetrated rainforests of the amazon contain countless undiscovered species.

the dense clay layer remained unpenetrated by the growing tree roots.

the security protocol stayed unpenetrated throughout the entire night despite multiple attempts.

the unpenetrated layers of volcanic rock preserved the fossils perfectly.