Where does “hexathlon” come from?

hexathlon (English) comes from English hex, from English hexagon, 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.

hexathlon (English): An athletic contest comprising six events

Definitions

An athletic contest comprising six events

Ancestry of “hexathlon”, step by step

Step	Language	Word	Meaning
1	English	hex	To cast a spell on (specifically an evil spell), to bewitch
2	English	hexagon	A polygon with six sides and six angles
3	Latin	hexagōnum	hexagon
4	Ancient Greek	ἑξάγωνον	hexagon
5	Ancient Greek	ἑξα-	Forming compound words with the sense of "six"
6	Ancient Greek	ἕξ	six
7	Proto-Hellenic	hwéks	cardinal...
8	Proto-Indo-European	swéḱs	six

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