Etymology

supplemental

S1U1P3P3L1E1M3E1N1T1A1L1

Today it means: Acting to supplement. Full definition →

Proto-Indo-European *h₂élisder.? ← English supplement
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The story

  1. Englishsupplement
  2. Proto-Indo-European*h₂el-
  3. Proto-Indo-European*h₂élisder.?
  4. English todaysupplemental

From supplement + -al.

Etymology from Wiktionary, CC BY-SA 4.0.