Etymology

acaricide

A1C3A1R1I1C3I1D2E1

Today it means: Any substance which kills acarids (mites and ticks). Full definition →

Latin caedō ← Proto-Italic *kaidō ← Proto-Indo-European *kh₂éydeti
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The story

  1. Englishacarid
  2. Proto-Indo-European*kh₂eyd-
  3. Proto-Indo-European*kh₂éydeti
  4. Proto-Italic*kaidō
  5. Latincaedō
  6. English todayacaricide

From acarid + -cide (“killer”).

Etymology from Wiktionary, CC BY-SA 4.0.