Etymology

crustal

C3R1U1S1T1A1L1

Today it means: Of, pertaining to, or forming a crust, especially the crust of the Earth or other planet. Full definition →

Proto-Indo-European *h₂élisder.? ← English crust ← Middle English cruste
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The story

  1. Proto-Indo-European*krews-
  2. Proto-Indo-European*krustós
  3. Proto-Italic*krustos
  4. Latincrusta
  5. Anglo-Normancruste
  6. Middle Englishcruste
  7. Englishcrust
  8. Proto-Indo-European*h₂el-
  9. Proto-Indo-European*h₂élisder.?
  10. English todaycrustal

From crust + -al.

Etymology from Wiktionary, CC BY-SA 4.0.