unimpregnable

English

Etymology

un- +‎ impregnable

Adjective

unimpregnable (comparative more unimpregnable, superlative most unimpregnable)

1. Not impregnable; capable of being pierced or assailed.
   • 1840, Pictures of the French, by J. Janin, Balzac, and other authors, page 180:

     Without being a coward, Jean's courage is not unimpregnable, and therefore plays he not the swaggerer amongst the patients.

2. Incapable of being impregnated; impermeable or infertile.

   The compound rendered the surface of the vessel unimpregnable.

   Despite fertility treatment, one out of three women in the study remained unimpregnable.