Etymology

pentyl

P3E1N1T1Y4L1

Today it means: Any of several isomeric univalent hydrocarbon radicals, C₅H₁₁, formally derived from pentane by the loss of a hydrogen atom. Full definition →

Ancient Greek ῡ̔́λη (hū́lē) ← Proto-Indo-European *swel-der.? ← English pentane
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The story

  1. Englishpentane
  2. Proto-Indo-European*swel-der.?
  3. Ancient Greekῡ̔́λη (hū́lē)
  4. English todaypentyl

From pentane + -yl.

Etymology from Wiktionary, CC BY-SA 4.0.