Where does “pentagonal” come from?
Pentagonal comes from English pentagon, from German Aldehyd, from Ancient Greek πεντάγωνον, πεντάγωνος, πέντε, through Proto-Hellenic and Proto-Indo-European pénkʷe.
pentagonal (English): Of, relating to, or shaped like a pentagon
Definitions
- Of, relating to, or shaped like a pentagon
Ancestry of “pentagonal”, step by step
| Step | Language | Word | Meaning |
|---|---|---|---|
| 1 | English | Pentagon | The headquarters of the United States Department of Defense |
| 2 | Middle French | pentagone | — |
| 3 | Late Latin | pentagonum | pentaphyllon |
| 4 | Ancient Greek | πεντάγωνον | pentagon |
| 5 | Ancient Greek | πεντάγωνος | five-angled |
| 6 | Ancient Greek | γωνία | corner, angle; joiner's square; cornerstone |
| 7 | Ancient Greek | γόνυ | knee |
| 8 | Proto-Hellenic | gónu | knee |
| 9 | Proto-Indo-European | ǵónu | knee |