Where does “thi đậu” come from?

thi đậu (Vietnamese) comes from Vietnamese đậu, from Vietnamese đậu phụ, from Chinese 豆腐 — tofu; bean curd; any food with tofu-like physical...

thi đậu (Vietnamese): to pass an examination

Definitions

thi đậu traces back through two separate lines of ancestry.

Step	Language	Word	Meaning
1	Vietnamese	đậu	bean; nut; to park
2	Vietnamese	đậu phụ	tofu
3	Chinese	豆腐	tofu; bean curd; any food with tofu-like physical...

Step	Language	Word	Meaning
1	Vietnamese	thì	Dated form of thời; the prime time in terms of...
2	Chinese	時	—
3	Old Chinese	之	—