Etymology

cotidal

C3O1T1I1D2A1L1

Today it means: Describing the locations (and of related lines on a chart) linking places where tides occur at the same time of day Full definition →

English tidal ← Proto-Indo-European *h₂élisder.? ← Middle English tide
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The story

  1. Proto-Indo-European*ḱe?
  2. Proto-Indo-European*ḱóm
  3. Proto-Italic*kom
  4. Proto-Italic*kom-
  5. Latincon-
  6. Latinco-
  7. Englishco-
  8. Proto-Indo-European*deh₂-
  9. Proto-Indo-European*deh₂y-
  10. Proto-Indo-European*déh₂itis
  11. Proto-Indo-European*dih₂tís
  12. Proto-Germanic*tīdiz
  13. Proto-West Germanic*tīdi
  14. Old Englishtīd
  15. Middle Englishtide
  16. Englishtide
  17. Proto-Indo-European*h₂el-
  18. Proto-Indo-European*h₂élisder.?
  19. Englishtidal
  20. English todaycotidal

From co- + tidal.

Etymology from Wiktionary, CC BY-SA 4.0.