ˈpregnəbəl adjective
Etymology: alteration (influenced by pregnant ) of earlier preignable, alteration (influenced by such words as reign, deign, with silent g ) of Middle English prenable, from Middle French — more at impregnable
1. : vulnerable to capture : expugnable
a pregnable fort
2.
[ pregn ate + -able ]
: capable of being impregnated
a pregnable cat