Etymology

isopentyl

I1S1O1P3E1N1T1Y4L1

Today it means: isoamyl Full definition →

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

  1. Ancient Greekῐ̓́σος (ĭ́sos)
  2. Englishiso-
  3. Englishpentane
  4. Proto-Indo-European*swel-der.?
  5. Ancient Greekῡ̔́λη (hū́lē)
  6. Englishpentyl
  7. English todayisopentyl

From iso- + pentyl.

Etymology from Wiktionary, CC BY-SA 4.0.