Funny English

Impregnable doesn't mean (a woman) cannot be made pregnant.

Impregnable /ɪmˈprɛɡnəbəl/ adjective

1.	strong enough to resist or withstand attack; not to be taken by force, unconquerable: an impregnable fort.
2.	not to be overcome or overthrown: an impregnable argument.

Inconceivable doesn't mean (a woman) cannot conceive.

Inconceivable /ˌɪnkənˈsiːvəbəl/ adjective

1.	unimaginable; unthinkable.
2.	unbelievable; incredible.

Unbearable doesn't mean (a woman) cannot bear children.

Unbearable /ʌnˈbɛərəbəl/ adjective

1.	not able to be borne or endured

{ Definitions taken from http://www.dictionary.com }