Where does “thói tật” come from?

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

thói tật (Vietnamese): vice, bad habit

Definitions

  1. vice, bad habit

Ancestry of “thói tật”, step by step

thói tật 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 tật

StepLanguageWordMeaning
1Vietnamesetậta disease; an illness
Every word from Proto-Austronesian daqiSEvery word from Proto-Malayo-Polynesian daqihEvery word from Proto-Chamic *ʔadhɛ̃y