Etymology

untrain

U1N1T1R1A1I1N1

Today it means: To reverse or undo one's training; to become less trained than before Full definition →

English train ← Middle English trayne ← Old French train
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The story

  1. Englishun-
  2. Proto-Indo-European*dʰregʰ-der.?
  3. Latintrahere
  4. Vulgar Latin*tragīnāre
  5. Old Frenchtraïner
  6. Old Frenchtrain
  7. Middle Englishtrayne
  8. Englishtrain
  9. English todayuntrain

From un- + train.

Etymology from Wiktionary, CC BY-SA 4.0.