Where does “生命水” come from?

生命水 (Middle Chinese) comes from Middle Chinese 水, from Proto-Sino-Tibetan lwi(j) — flow; stream.

Ancestry of “生命水”, step by step

StepLanguageWordMeaning
1Middle Chinese水—
2Proto-Sino-Tibetanlwi(j)flow; stream
Every word from Proto-Sino-Tibetan lwi(j) →Every word from Middle Chinese 水 →