Etymology

substream

S1U1B3S1T1R1E1A1M3

Today it means: A stream contained within another stream. Full definition →

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

  1. Latinsub
  2. Latinsub-
  3. Englishsub-
  4. Proto-Indo-European*ser-?
  5. Proto-Indo-European*srew-
  6. Proto-Indo-European*srow-mo-s
  7. Proto-Germanic*straumaz
  8. Proto-West Germanic*straum
  9. Old Englishstrēam
  10. Middle Englishstrem
  11. Englishstream
  12. English todaysubstream

From sub- + stream.

Etymology from Wiktionary, CC BY-SA 4.0.