Where does “diagonally” come from?

Diagonally comes from English diagonal, derived from Middle French diagonal, from Latin diagonalis, from Ancient Greek διαγώνιος, which combines διά (through) with a word related to the knee or angle.

diagonally (English): In a diagonal manner, not square to any direction

Definitions

  1. In a diagonal manner, not square to any direction

Ancestry of “diagonally”, step by step

StepLanguageWordMeaning
1EnglishdiagonalJoining two nonadjacent vertices; Having slanted...
2Middle Frenchdiagonal
3Latindiagōnālisdiagonal
4Ancient Greekδιαγώνιοςfrom angle to angle
5Ancient Greekδῐᾰ-apart; through, across; through; in different...
6Ancient Greekδιάthroughout
7Proto-Indo-Europeandwístwice, doubly; in two
8Proto-Indo-Europeandwóh₁two
Every word from Proto-Indo-European dwóh₁Every word from Ancient Greek δῐᾰ-Every word from Proto-Indo-European dwís