Etymology

menstruate

men·stru·ate
M3E1N1S1T1R1U1A1T1E1

Today it means: To stain with or as if with menses. Full definition →

English menstruum ← Latin mēnstruum ← Proto-Italic *mēnsis
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menstruate · verb1

From menstruum + -ate (verb-forming suffix); sense 2 (“to undergo menstruation”) is possibly a back-formation from menstruation.

menstruate · adjective2

  1. Proto-Indo-European*dwóh₁
  2. Proto-Indo-European*dwi-
  3. Proto-Italic*dwi-
  4. Latinbi-
  5. Proto-Indo-European*med-
  6. Proto-Indo-European*meh₁-?
  7. Proto-Indo-European*mḗh₁n̥s
  8. Proto-Italic*mēns
  9. Proto-Italic*mēnsis
  10. Latinmēnsis
  11. Latinbimēnstrisbf.
  12. Latinannuusinflu.
  13. Latinmēnstruus
  14. Latinmēnstruum
  15. Englishmenstruum
  16. English todaymenstruate

From menstruum + -ate (adjective-forming usffix).

Etymology from Wiktionary, CC BY-SA 4.0.