Where does “icosi-” come from?

icosi- (English) comes from Ancient Greek εἴκοσι, from Proto-Hellenic ewīkəti, from Proto-Indo-European wídḱm̥ti, from Proto-Indo-European dwidḱómt, from Proto-Indo-European déḱm̥t — ten.

Ancestry of “icosi-”, step by step

StepLanguageWordMeaning
1Ancient Greekεἴκοσιtwenty
2Proto-Hellenicewīkəti—
3Proto-Indo-Europeanwídḱm̥titwenty
4Proto-Indo-Europeandwidḱómt—
5Proto-Indo-Europeandéḱm̥tten

Words derived from “icosi-”

Every word from Proto-Indo-European déḱm̥t →Every word from Proto-Indo-European dwidḱómt →Every word from Proto-Indo-European wídḱm̥ti →