Where does “شش” come from?

شش (Ottoman Turkish) comes from Persian شش, from Proto-Iranian šwáš, from Proto-Indo-Iranian šwáćš, from Proto-Indo-European swéḱs — six.

Ancestry of “شش”, step by step

StepLanguageWordMeaning
1Persianششsix; lung
2Proto-Iranianšwáš—
3Proto-Indo-Iranianšwáćšsix
4Proto-Indo-Europeanswéḱssix

Words derived from “شش”

Every word from Proto-Indo-European swéḱs →Every word from Proto-Indo-Iranian šwáćš →Every word from Proto-Iranian šwáš →