Etymology

intraday

I1N1T1R1A1D2A1Y4

Today it means: occurring during a single day. Full definition →

English day ← Middle English day ← Old English dæġ
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The story

  1. Proto-Indo-European*h₁én
  2. Proto-Indo-European*h₁énteros
  3. Latin*interus
  4. Latinintrā
  5. Englishintra-
  6. Proto-Indo-European*dʰegʷʰ-?
  7. Proto-Germanic*dagaz
  8. Proto-West Germanic*dag
  9. Old Englishdæġ
  10. Middle Englishday
  11. Englishday
  12. English todayintraday

From intra- + day.

Etymology from Wiktionary, CC BY-SA 4.0.