Etymology

incisor

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Today it means: A narrow-edged tooth at the front of the mouth of mammals, between the canines and adapted for cutting; in humans there are four in each jaw. Full definition →

New Latin incīsor ← Latin incīdō ← Proto-Italic *kaidō
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The story

  1. Proto-Indo-European*h₁én
  2. Proto-Italic*en
  3. Proto-Italic*en-
  4. Latinin-
  5. Proto-Indo-European*kh₂eyd-
  6. Proto-Indo-European*kh₂éydeti
  7. Proto-Italic*kaidō
  8. Latincaedō
  9. Latinincīdō
  10. New Latinincīsor
  11. English todayincisor

Borrowed from New Latin incīsor, from Latin incīdō (“to cut into, cut through”) + -tor (“-er, -or”, agent noun suffix).

Etymology from Wiktionary, CC BY-SA 4.0.