Etymology

greaseproof

G2R1E1A1S1E1P3R1O1O1F4

Today it means: Resistant to grease. Full definition →

English proof ← Middle English grece ← Anglo-Norman grece
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The story

  1. Latincrassus
  2. Vulgar Latin*crassia
  3. Anglo-Normangrece
  4. Middle Englishgrece
  5. Englishgrease
  6. Englishproof
  7. English todaygreaseproof

From grease + -proof.

Etymology from Wiktionary, CC BY-SA 4.0.