Etymology

unproductively

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Today it means: In an unproductive manner. Full definition →

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

  1. Proto-Indo-European*né
  2. Proto-Indo-European*n̥-
  3. Proto-Germanic*un-
  4. Proto-West Germanic*un-
  5. Old Englishun-
  6. Middle Englishun-
  7. Englishun-
  8. Proto-Indo-European*per-der.?
  9. Proto-Indo-European*pér
  10. Proto-Indo-European*pró
  11. Proto-Indo-European*pro-
  12. Proto-Italic*pro-
  13. Latinprō-
  14. Proto-Indo-European*dewk-
  15. Proto-Indo-European*déwkti
  16. Proto-Italic*doukō
  17. Latindūcō
  18. Latinprōdūcō
  19. Late Latinprōductīvus
  20. Englishproductive
  21. Englishunproductive
  22. Proto-Indo-European*leyg-
  23. Proto-Germanic*līką
  24. English todayunproductively

From unproductive + -ly.

Etymology from Wiktionary, CC BY-SA 4.0.