Etymology

moonlight

moon·light
M3O1O1N1L1I1G2H4T1

Today it means: The light reflected from the Moon, which seems to emanate from it. Full definition →

Middle English moonelight ← Old English lēoht ← Proto-West Germanic *leuht
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The story

  1. Proto-Indo-European*med-
  2. Proto-Indo-European*meh₁-?
  3. Proto-Indo-European*mḗh₁n̥s
  4. Proto-Germanic*mēnô
  5. Proto-West Germanic*mānō
  6. Old Englishmōna
  7. Middle Englishmone
  8. Proto-Indo-European*lewk-
  9. Proto-Indo-European*lewktom
  10. Proto-Germanic*leuhtą
  11. Proto-West Germanic*leuht
  12. Old Englishlēoht
  13. Middle Englishlight
  14. Middle Englishmoonelight
  15. English todaymoonlight

The noun is derived from Middle English moonelight, monelight, mone lyght (“light of the moon; (heraldry) pattern of moons on the field of a heraldic banner”), from mon, mone (“moon”) (from Old English mōna (“moon”), ultimately from Proto-Indo-European *mḗh₁n̥s (“moon; month”)) + light (“light”) (from Old English lēoht (“light”), ultimately from Proto-Indo-European *lewk- (“bright; to see; to shine”)). By surface analysis, moon + light. The verb is derived from the noun. Verb sense 1.1 (“to secretly leave premises without paying the rent”) is a back-formation from moonlight flit, while verb sense 1.2 (“to make a night-time attack on a tenant farmer”) is probably a back-formation from moonlighter. cognates * Dutch maanlicht * German Mondlicht * Scots muinlicht, munelicht * West Frisian moanneljocht

Words from the same roots

Old Englishmōna all →

Proto-Indo-European*mḗh₁n̥s all →

monthmoonmanilla

Old Englishlēoht all →

lightLightbourne

Proto-Indo-European*lewk- all →

lowlightlighterlunarlynxlevinluxillustriouslumelucidatealightluminarylownillumineleamlosselimnpellucidluminationsublunary

Etymology from Wiktionary, CC BY-SA 4.0.