Where does “nam trầm” come from?

nam trầm (Vietnamese) comes from Vietnamese năm, from Proto-Chamic *nam, from Proto-Malayo-Polynesian ənəm, from Proto-Austronesian ənəm, from Proto-Austroasiatic *ənəm.

nam trầm (Vietnamese): bass, low in pitch

Definitions

  1. bass, low in pitch

Ancestry of “nam trầm”, step by step

nam trầm traces back through two separate lines of ancestry.

via Vietnamese năm

StepLanguageWordMeaning
1Vietnamesenămfive; a year
2Proto-Chamic*namsix
3Proto-Malayo-Polynesianənəmsix
4Proto-Austronesianənəmsix
5Proto-Austroasiatic*ənəm—

via Vietnamese trầm

StepLanguageWordMeaning
1Vietnamesetrầmto sink (into); to plunge (into)
2Chinese沈—
Every word from Proto-Austroasiatic *ənəm →Every word from Proto-Austronesian ənəm →Every word from Proto-Malayo-Polynesian ənəm →