Where does “ཅ་མ” come from?

ཅ་མ (Kurtop) comes from Kurtop ཅ, from Tibetan ལྕགས, from Proto-Sino-Tibetan hljak — iron, iron instrument.

Ancestry of “ཅ་མ”, step by step

ཅ་མ traces back through two separate lines of ancestry.

via Kurtop ཅ

StepLanguageWordMeaning
1Kurtopཅ—
2Tibetanལྕགསiron
3Proto-Sino-Tibetanhljakiron, iron instrument

via Kurtop མ

StepLanguageWordMeaning
1Kurtopམ—
Every word from Proto-Sino-Tibetan hljak →Every word from Tibetan ལྕགས →Every word from Kurtop ཅ →