Where does “Pentateuch” come from?

Pentateuch comes from Ancient Greek πεντάτευχος, combining πέντε (five) and τεῦχος (book), from Proto-Hellenic pénkʷe and Proto-Indo-European pénkʷe.

Ancestry of “Pentateuch”, step by step

StepLanguageWordMeaning
1LatinPentateuchus—
2Ancient Greekπεντάτευχοςconsisting of five papyrus rolls or (more generally) five books
3Ancient Greekπεντα-penta-, five; five
4Ancient Greekπέντεfive
5Proto-Hellenicpénkʷefive
6Proto-Indo-Europeanpénkʷefive

Words derived from “Pentateuch”

Every word from Proto-Indo-European pénkʷe →Every word from Ancient Greek πεντα- →Every word from Proto-Hellenic pénkʷe →