Etymology

affine

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Today it means: Assigning finite values to finite quantities. Full definition →

Latin affinis ← Proto-Italic *ad ← Proto-Indo-European *h₂éd
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The story

  1. Proto-Indo-European*h₂éd
  2. Proto-Italic*ad
  3. Latinad
  4. Latinfīnis
  5. Latinaffinis
  6. English todayaffine

Borrowed from Latin affinis, from ad + fīnis (“boundary”).

Etymology from Wiktionary, CC BY-SA 4.0.