Etymology

sulfonyl

S1U1L1F4O1N1Y4L1

Today it means: The bivalent radical or functional group -SO₂- Full definition →

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

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

From sulfonic + -yl.

Etymology from Wiktionary, CC BY-SA 4.0.