Webster’s Revised Unabridged Dictionary · 1913
Impregn
Im·pregn′ (ĭm·prēn′), v. t. [Cf. F. impregner. See Impregnate.] To impregnate; to make fruitful. [Obs.]
His pernicious words, impregned With reason. Milton.
Semele doth Bacchus bear Impregned of Jove. Dr. H. More.