Earlier impregn, from Middle French imprégner, from Old French enpreignier.

• IPA: /ˈɪmpɹɛɡneɪt/, /ɪmˈpɹɛɡneɪt/

impregnate (impregnates, present participle impregnating; simple past and past participle impregnated)

1. (transitive) To cause to become pregnant.

   Synonyms: knock up, inseminate, cover

   I was impregnated at a clinic but don't know who the sperm donor is.

2. (transitive) To fertilize.
3. (transitive) To saturate, or infuse.
   • 1791, John Walker, A Critical Pronouncing Dictionary […] ‎, London: Sold by G. G. J. and J. Robinſon, Paternoſter Row; and T. Cadell, in the Strand, →OCLC ↗, page 498:

     To Tartarize, ta²r'ta⁴r-i¹ze, v. a.
     To impregnate with tartar.

   • 1835, Charles Lyell, Principles of Geology […] , 4th edition, volume III, London: John Murray, Book IV, page 322 ↗:

     We find those charæ which secrete the largest quantity of calcareous matter in their stems to abound near springs impregnated with carbonate of lime.

4. (transitive) To fill pores or spaces with a substance.
   • 1937, Hugh Bertie Campbell Pollard, The mystery of scent, page 121:

     It takes a little time for the personal fatty acids to impregnate new shoes or boots, but from the scent point of view leather is a sponge, and the personal scent is left.

5. (intransitive, dated) To become pregnant.
   • 2024 September 22 (Gregorian calendar), [Joseph Addison], “SUNDAY, Error: invalid time,
     Error: invalid time”, in The Spectator, number (please specify the issue number); republished in Alexander Chalmers, editor, The Spectator; a New Edition, […], volume (please either specify the issue number or |volume=I to VI), New York, N.Y.: D[aniel] Appleton & Company, 1853, →OCLC ↗:

     Were they, like Spanish Jennets, to impregnate by the Wind, they could not have thought on a more proper Invention.

     The spelling has been modernized.