Etymology

cisternal

C3I1S1T1E1R1N1A1L1

Today it means: Relating to cisterns or cisternae. Full definition →

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

  1. Englishcistern
  2. Proto-Indo-European*h₂el-
  3. Proto-Indo-European*h₂élisder.?
  4. English todaycisternal

From cistern + -al.

Etymology from Wiktionary, CC BY-SA 4.0.