Where does “nước đôi” come from?

nước đôi (Vietnamese) comes from Vietnamese nước, from Proto-Vietic ɗaːk, from Proto-Mon-Khmer ɗaak — water; liquid; The sense of "river, stream" that...

nước đôi (Vietnamese): ambiguous, equivocal

Definitions

  1. ambiguous, equivocal

Ancestry of “nước đôi”, step by step

nước đôi traces back through two separate lines of ancestry.

via Vietnamese nước

StepLanguageWordMeaning
1Vietnamesenướcwater; liquid; fluid; the liquid part of a broth
2Proto-Vieticɗaːkwater, liquid
3Proto-Mon-Khmerɗaakwater; liquid; The sense of "river, stream" that...

via Vietnamese đôi

StepLanguageWordMeaning
1Vietnameseđôidouble
2Middle Chinese對—
Every word from Proto-Mon-Khmer ɗaak →Every word from Proto-Vietic ɗaːk →Every word from Vietnamese nước →