Etymology

extraplanetary

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Today it means: Originating, or located outside of a planet Full definition →

English planetary ← Latin extrā ← Proto-Italic *eksteros
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The story

  1. Proto-Indo-European*h₁éǵʰ
  2. Proto-Indo-European*h₁éǵʰs
  3. Proto-Indo-European*h₁eǵʰsteros
  4. Proto-Italic*eksteros
  5. Latinexter
  6. Latinextrā
  7. Englishextra-
  8. Englishplanet
  9. Englishplanetary
  10. English todayextraplanetary

From extra- + planetary.

Etymology from Wiktionary, CC BY-SA 4.0.