Where does “hình thoi” come from?
hình thoi (Vietnamese) comes from Vietnamese thối, from Proto-Chamic *ʔadhɛ̃y, from Proto-Malayo-Polynesian daqih, from Proto-Austronesian daqiS — forehead.
hình thoi (Vietnamese): rhombus
Ancestry of “hình thoi”, step by step
| Step | Language | Word | Meaning |
|---|
| 1 | Vietnamese | thối | rotten; fetid, putrid, stinking, foul-smelling;... |
| 2 | Proto-Chamic | *ʔadhɛ̃y | — |
| 3 | Proto-Malayo-Polynesian | daqih | forehead |
| 4 | Proto-Austronesian | daqiS | forehead |