Where does “thói đời” come from?

thói đời (Vietnamese) comes from Vietnamese thối, from Proto-Chamic *ʔadhɛ̃y, from Proto-Malayo-Polynesian daqih, from Proto-Austronesian daqiS — forehead.

thói đời (Vietnamese): the ways of the world; the habits of people

Definitions

  1. the ways of the world; the habits of people

Ancestry of “thói đời”, step by step

thói đời traces back through two separate lines of ancestry.

via Vietnamese thối

StepLanguageWordMeaning
1Vietnamesethốirotten; fetid, putrid, stinking, foul-smelling;...
2Proto-Chamic*ʔadhɛ̃yforehead
3Proto-Malayo-Polynesiandaqihforehead
4Proto-AustronesiandaqiSforehead

via Vietnamese đời

StepLanguageWordMeaning
1Vietnameseđờilife; world; generation
2Middle Chinese代—
Every word from Proto-Austronesian daqiS →Every word from Proto-Malayo-Polynesian daqih →Every word from Proto-Chamic *ʔadhɛ̃y →