Etymology

understream

U1N1D2E1R1S1T1R1E1A1M3

Today it means: The lower or deeper part of a stream, especially a current in such a place Full definition →

English stream ← Middle English strem ← Old English strēam
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The story

  1. Proto-Indo-European*h₁én
  2. Proto-Indo-European*h₁entér
  3. Proto-Indo-European*h₂én
  4. Proto-Indo-European*dʰeh₁-?
  5. Proto-Indo-European*(H)n̥dʰí
  6. Proto-Indo-European*(H)n̥dʰér
  7. Proto-Germanic*under
  8. Proto-West Germanic*undar
  9. Old Englishunder-
  10. Middle Englishunder-
  11. Englishunder-
  12. Proto-Indo-European*ser-?
  13. Proto-Indo-European*srew-
  14. Proto-Indo-European*srow-mo-s
  15. Proto-Germanic*straumaz
  16. Proto-West Germanic*straum
  17. Old Englishstrēam
  18. Middle Englishstrem
  19. Englishstream
  20. English todayunderstream

From under- + stream.

Etymology from Wiktionary, CC BY-SA 4.0.