Where does “ཚེས་བཅུ” come from?

ཚེས་བཅུ (Tibetan) comes from Tibetan བཅུ, from Proto-Sino-Tibetan ts(j)i(j) ~ tsjaj — ten.

Ancestry of “ཚེས་བཅུ”, step by step

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

via Tibetan བཅུ

StepLanguageWordMeaning
1Tibetanབཅུten; future of འཆུ
2Proto-Sino-Tibetants(j)i(j) ~ tsjajten

via Tibetan ཚེས

StepLanguageWordMeaning
1Tibetanཚེསdate, day of the month
Every word from Proto-Sino-Tibetan ts(j)i(j) ~ tsjajEvery word from Tibetan བཅུ