Etymology

brushless

B3R1U1S1H4L1E1S1S1

Today it means: Of an electric motor: that does not use brushes, physical contacts for the commutator. Full definition →

Proto-Germanic *lausaz ← Proto-Indo-European *lewHs- ← English brush
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The story

  1. Proto-Indo-European*bʰers-
  2. Proto-Indo-European*bʰr̥stís
  3. Proto-Germanic*bʰurstís
  4. Proto-Germanic*burstiz
  5. Frankish*bursti
  6. Vulgar Latin*brustia
  7. Old Frenchbroisse
  8. Middle Englishbrusshe
  9. Englishbrush
  10. Proto-Indo-European*lewh₁-
  11. Proto-Indo-European*lewHs-
  12. Proto-Germanic*leusaną
  13. Proto-Germanic*lausaz
  14. English todaybrushless

From brush + -less.

Etymology from Wiktionary, CC BY-SA 4.0.