Where does “hexagonal” come from?

hexagonal (Catalan) comes from Catalan hexàgon, from Latin hexagōnum, from Ancient Greek ἑξάγωνον, from Ancient Greek ἑξα-, from Ancient Greek ἕξ, from Proto-Hellenic hwéks, from Proto-Indo-European swéḱs — six.

hexagonal (Catalan): hexagonal

Definitions

hexagonal

Ancestry of “hexagonal”, step by step

hexagonal traces back through two separate lines of ancestry.

via Catalan hexàgon

Step	Language	Word	Meaning
1	Catalan	hexàgon	hexagon
2	Latin	hexagōnum	hexagon
3	Ancient Greek	ἑξάγωνον	hexagon
4	Ancient Greek	ἑξα-	Forming compound words with the sense of "six"
5	Ancient Greek	ἕξ	six
6	Proto-Hellenic	hwéks	cardinal...
7	Proto-Indo-European	swéḱs	six

via Catalan al

Step	Language	Word	Meaning
1	Catalan	al	—

Every word from Proto-Indo-European swéḱs →Every word from Ancient Greek ἑξα- →Every word from Ancient Greek ἑξάγωνον →