Where does “vôi chín” come from?

vôi chín (Vietnamese) comes from Vietnamese vôi, from Proto-Vietic k-puːr, from Proto-Mon-Khmer knpur — lime.

Ancestry of “vôi chín”, step by step

vôi chín traces back through two separate lines of ancestry.

via Vietnamese vôi

StepLanguageWordMeaning
1Vietnamesevôilime
2Proto-Vietick-puːrlime
3Proto-Mon-Khmerknpurlime

via Vietnamese chín

StepLanguageWordMeaning
1Vietnamesechínnine; well done; ripe
2Proto-Vieticciːnʔcooked; ripe
3Proto-Mon-Khmerdciinʔ—
Every word from Proto-Mon-Khmer knpur →Every word from Proto-Vietic k-puːr →Every word from Vietnamese vôi →