Where does “nước nặng” come from?

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

nước nặng (Vietnamese): heavy water

Definitions

  1. heavy water

Ancestry of “nước nặng”, step by step

nước nặng 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 nặng

StepLanguageWordMeaning
1Vietnamesenặngheavy; stressing due to containing a lot of...
2Proto-Vieticɗaŋʔ—
3Proto-Mon-Khmerp(ɗ)aŋdry season
Every word from Proto-Mon-Khmer ɗaak →Every word from Proto-Vietic ɗaːk →Every word from Vietnamese nước →