(obsolete) Not pregnant; unfertilized or infertile.

(obsolete) That which impregnates.

plural of impregnant

The act of making pregnant; fertilization. / The fact or process of imbuing or saturating with something; diffusion of some element, idea etc. through a medium or substance.

(transitive) To cause to become pregnant. / (transitive) To fertilize. / (transitive) To saturate, or infuse. / (transitive) To fill pores or spaces with a substance.

(military) Of a fortress or other fortified place: able to withstand all attacks; impenetrable, inconquerable, unvanquishable. / (figuratively) Too strong to be defeated or overcome; invincible.

Capable of being impregnated; impregnatable.

In an impregnable manner; so as to defy attack.

The quality or state of being impregnable; invincibility.

present participle of impregnate