Where does “*षोळश” come from?

*षोळश (Sanskrit) comes from Proto-Indo-Aryan swáẓḍaśa, from Proto-Indo-Aryan dáśa, from Proto-Indo-Iranian daća, from Proto-Indo-European déḱm̥ — ten.

Ancestry of “*षोळश”, step by step

StepLanguageWordMeaning
1Proto-Indo-Aryanswáẓḍaśasixteen
2Proto-Indo-Aryandáśaten
3Proto-Indo-Iraniandaćaten
4Proto-Indo-Europeandéḱm̥ten
Every word from Proto-Indo-European déḱm̥ →Every word from Proto-Indo-Iranian daća →Every word from Proto-Indo-Aryan dáśa →