adjective
able to be captured or defeated; vulnerable to attack
-
The fortress was deemed impregnable due to its high walls and strong defenses.
-
That castle looks pretty pregnable, we could probably sneak in through the back.
-
The security at that place is so pregnable, we could totally get in without anyone noticing.
-
Her arguments were so well-reasoned and logical that they seemed pregnable to even the staunchest critics.