impregnable
US /ɪmˈpreɡ.nə.bəl/
UK /ɪmˈpreɡ.nə.bəl/
1.
zaptedilemez
A building or other place that is impregnable is so strongly built and/or defended that it cannot be entered by force:
:
•
Despite burglar alarms and window locks, homes are never impregnable against determined thieves.