Where does “mật ngọt chết ruồi” come from?

mật ngọt chết ruồi (Vietnamese) comes from Vietnamese chết, from Proto-Vietic k-ceːt, from Proto-Austroasiatic *kceːt — to die.

Ancestry of “mật ngọt chết ruồi”, step by step

mật ngọt chết ruồi traces back through 3 separate lines of ancestry.

via Vietnamese chết

StepLanguageWordMeaning
1Vietnamesechếtto die; dead
2Proto-Vietick-ceːtto die
3Proto-Austroasiatic*kceːtto die

via Vietnamese ruồi

StepLanguageWordMeaning
1Vietnameseruồia fly
2Proto-Vieticm-rɔːj—
3Proto-Austroasiatic*roajfly (insect)

via Vietnamese mật

StepLanguageWordMeaning
1Vietnamesemậthoney; concentrated sugarcane juice; molasses;...
2Middle Chinese密—
Every word from Proto-Austroasiatic *kceːt →Every word from Proto-Vietic k-ceːt →Every word from Vietnamese chết →