Etymology

coincidentally

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Today it means: In a coincidental manner. Full definition →

Proto-Germanic *līką ← Proto-Indo-European *leyg- ← English coincidental
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The story

  1. Proto-Indo-European*ḱe?
  2. Proto-Indo-European*ḱóm
  3. Proto-Italic*kom
  4. Proto-Italic*kom-
  5. Latincon-
  6. Latinco-
  7. Englishco-
  8. Englishincident
  9. Proto-Indo-European*h₂el-
  10. Proto-Indo-European*h₂élisder.?
  11. Englishincidental
  12. Englishcoincidental
  13. Proto-Indo-European*leyg-
  14. Proto-Germanic*līką
  15. English todaycoincidentally

From coincidental + -ly.

Etymology from Wiktionary, CC BY-SA 4.0.