Where does “pentakaidecahedron” come from?

pentakaidecahedron (English) comes from English -hedron, from Ancient Greek ἕδρα, from Proto-Hellenic *hédrā.

Ancestry of “pentakaidecahedron”, step by step

StepLanguageWordMeaning
1English-hedron"Forms the names of solid figures bounded by a...
2Ancient Greekἕδραseat, chair, stool, bench; the act of sitting;...
3Proto-Hellenic*hédrā—
Every word from Proto-Hellenic *hédrā →Every word from Ancient Greek ἕδρα →Every word from English -hedron →