Etymology

optoisolator

O1P3T1O1I1S1O1L1A1T1O1R1

Today it means: A device that transmits a signal optically between two isolated electronic circuits Full definition →

English isolator ← Ancient Greek ὀπτός (optós) ← Proto-Indo-European *h₃ekʷ-
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The story

  1. Proto-Indo-European*h₃ekʷ-
  2. Ancient Greekὄπωπᾰ (ópōpă)
  3. Ancient Greekὀπτός (optós)
  4. Englishopto-
  5. Englishisolate
  6. Englishisolator
  7. English todayoptoisolator

From opto- + isolator.

Etymology from Wiktionary, CC BY-SA 4.0.