IPA: /ɪmˈprɛɡnəˌbɪlɪti/
KK: /ɪmˈprɛɡnəˌbɪlɪti/
The state of being impossible to capture or defeat; being very strong and secure.
The fortress was known for its impregnability, making it a safe refuge during the war.
Impregnability is formed from "im-" (meaning not) and "pregnare" (meaning to conceive or become pregnant) combined with the suffix "-ability" (meaning the quality of being able to). The term refers to the quality of being unable to be penetrated or conquered, much like a fortress that cannot be taken.
Think of 'not able' ('im-' means not, and '-ability' means the quality of being able) to remember that 'impregnability' refers to something that cannot be penetrated or conquered.