Where does “hết thời” come from?

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

hết thời (Vietnamese): out of date, out of fashion

Definitions

  1. out of date, out of fashion

Ancestry of “hết thời”, step by step

hết thời 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 hết

StepLanguageWordMeaning
1Vietnamesehếtto finish, to end, to expire, to come to an end;...
2Proto-Vieticheːtfinished
3Proto-Mon-Khmerʔət—
Every word from Proto-Austronesian daqiS →Every word from Proto-Malayo-Polynesian daqih →Every word from Proto-Chamic *ʔadhɛ̃y →