Etymology

diagramless

D2I1A1G2R1A1M3L1E1S1S1

Today it means: Having a blank grid, so that the solver must determine the positions of the black (non-lettered) squares as well as the answers to the clues. Full definition →

Proto-Germanic *lausaz ← Proto-Indo-European *lewHs- ← English diagram
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The story

  1. Proto-Indo-European*dwóh₁
  2. Proto-Indo-European*trísinflu.
  3. Proto-Indo-European*dwís
  4. Ancient Greekδιά (diá)
  5. Ancient Greekδῐᾰ- (dĭă-)
  6. Proto-Indo-European*gerbʰ-
  7. Proto-Hellenic*grə́pʰō
  8. Ancient Greekγρᾰ́φω (grắphō)
  9. Ancient Greekγρᾰ́μμᾰ (grắmmă)
  10. Ancient Greekδιάγραμμα (diágramma)
  11. Italiandiagramma
  12. Frenchdiagramme
  13. Englishdiagram
  14. Proto-Indo-European*lewh₁-
  15. Proto-Indo-European*lewHs-
  16. Proto-Germanic*leusaną
  17. Proto-Germanic*lausaz
  18. English todaydiagramless

From diagram + -less.

Etymology from Wiktionary, CC BY-SA 4.0.