Where does “pentagonal” come from?
pentagonal (French) comes from French pentagone, from Latin pentagonus, from Ancient Greek πεντάγωνος, from Ancient Greek γωνία, from Ancient Greek γόνυ, from Proto-Hellenic gónu, from Proto-Indo-European ǵónu — knee.
pentagonal (French): pentagonal
Ancestry of “pentagonal”, step by step
| Step | Language | Word | Meaning |
|---|
| 1 | French | pentagone | pentagon |
| 2 | Latin | pentagonus | — |
| 3 | Ancient Greek | πεντάγωνος | five-angled |
| 4 | Ancient Greek | γωνία | corner, angle; joiner's square; cornerstone |
| 5 | Ancient Greek | γόνυ | knee |
| 6 | Proto-Hellenic | gónu | knee |
| 7 | Proto-Indo-European | ǵónu | knee |