Etymology

pentennial

P3E1N1T1E1N1N1I1A1L1

Today it means: Synonym of quinquennial: occurring every five years. Full definition →

Ancient Greek πέντε ← Latin annus
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The story

  1. Latin · derived fromannus“year”
  2. Ancient Greek · derived fromπέντε“five”
  3. English todaypentennial

From Ancient Greek πέντε (pénte, “five”) + Latin annus (“year”) + -ial.

Words from the same roots

Ancient Greekπέντε all →

Pentateuchpentachoronpentacronpentapodypentuplepeta-

Latinannus all →

annus horribilisannus mirabilis

Etymology from Wiktionary, CC BY-SA 4.0.