Etymology

antidiagonal

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Today it means: The diagonal of a matrix that leads from top-right towards bottom-left. Full definition →

English diagonal ← Ancient Greek ἀντι- (anti-) ← Proto-Indo-European *h₂énti
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The story

  1. Proto-Indo-European*h₂ent-
  2. Proto-Indo-European*h₂énts
  3. Proto-Indo-European*h₂énti
  4. Ancient Greekᾰ̓ντῐ́ (ăntĭ́)
  5. Ancient Greekἀντι- (anti-)
  6. Englishanti-
  7. Englishdiagonal
  8. English todayantidiagonal

From anti- + diagonal.

Etymology from Wiktionary, CC BY-SA 4.0.