Where does “ཚེས་གསུམ” come from?

ཚེས་གསུམ (Tibetan) comes from Tibetan གསུམ, from Proto-Sino-Tibetan *kV-sum — three.

Ancestry of “ཚེས་གསུམ”, step by step

ཚེས་གསུམ traces back through two separate lines of ancestry.

via Tibetan གསུམ

StepLanguageWordMeaning
1Tibetanགསུམthree
2Proto-Sino-Tibetan*kV-sumthree

via Tibetan ཚེས

StepLanguageWordMeaning
1Tibetanཚེསdate, day of the month
Every word from Proto-Sino-Tibetan *kV-sum →Every word from Tibetan གསུམ →