Where does “hextetrahedron” come from?

hextetrahedron (English) comes from English tetrahedron, from Ancient Greek τετράεδρον, from Ancient Greek τετράεδρος, from Ancient Greek -ός, from Proto-Hellenic *-os, from Proto-Indo-European -ós — Creates agent nouns from verb stems, denoting...

Ancestry of “hextetrahedron”, step by step

Step	Language	Word	Meaning
1	English	tetrahedron	A polyhedron with four faces; the regular...
2	Ancient Greek	τετράεδρον	triangle-based pyramid
3	Ancient Greek	τετράεδρος	having four faces, tetrahedral
4	Ancient Greek	-ός	Forms agentive or patientive adjectives and nouns from the o-grade of a verbal root
5	Proto-Hellenic	*-os	—
6	Proto-Indo-European	-ós	Creates agent nouns from verb stems, denoting...

Every word from Proto-Indo-European -ós →Every word from Ancient Greek -ός →Every word from Ancient Greek τετράεδρος →