Where does “tetragonal” come from?

tetragonal (Catalan) comes from English tetragon, from French tétragone, from French -gone, from Ancient Greek γωνία, from Ancient Greek γόνυ, from Proto-Hellenic gónu, from Proto-Indo-European ǵónu — knee.

tetragonal (Catalan): tetragonal, quadrilateral

Definitions

  1. tetragonal, quadrilateral

Ancestry of “tetragonal”, step by step

StepLanguageWordMeaning
1EnglishtetragonQuadrilateral; An aspect of two planets with...
2Frenchtétragonetetragon; tetragonal
3French-gone-gon
4Ancient Greekγωνίαcorner, angle; joiner's square; cornerstone
5Ancient Greekγόνυknee
6Proto-Hellenicgónuknee
7Proto-Indo-Europeanǵónuknee
Every word from Proto-Indo-European ǵónu →Every word from Proto-Hellenic gónu →Every word from Ancient Greek γόνυ →