Etymology

astro-

Today it means: celestial bodies: fixed stars, wandering stars (planets), etc.; space; astronomy Full definition →

Ancient Greek ᾰ̓́στρον (ắstron) ← Proto-Hellenic *astḗr ← Proto-Indo-European *h₂stḗr
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The story

  1. Proto-Indo-European*h₂eHs-
  2. Proto-Indo-European*h₂stḗr
  3. Proto-Hellenic*astḗr
  4. Ancient Greekἀστήρ (astḗr)
  5. Ancient Greekᾰ̓́στρον (ắstron)
  6. English todayastro-

From Ancient Greek ἄστρον (ástron, “celestial body”).

Words from the same roots

Ancient Greekἄστρον all →

disasterastronautastralastrognosyastroid

Etymology from Wiktionary, CC BY-SA 4.0.