Where does “dạ vâng” come from?

dạ vâng (Vietnamese) comes from Vietnamese vàng, from French vin, from Middle French vin, from Old French vin, from Latin vīnum, from Proto-Italic wīnom, from Proto-Indo-European wóyh₁nom, from Proto-Indo-European weh₁y- — to twist, wind, weave, plait; to wrap, enclose,...

dạ vâng (Vietnamese): A sentence-initial interjection used to give confirmation for others in a respectful, formal way

Definitions

A sentence-initial interjection used to give confirmation for others in a respectful, formal way

Ancestry of “dạ vâng”, step by step

dạ vâng traces back through two separate lines of ancestry.

via Vietnamese vàng

Step	Language	Word	Meaning
1	Vietnamese	vàng	yellow; gold
2	French	vin	wine
3	Middle French	vin	wine
4	Old French	vin	wine
5	Latin	vīnum	wine
6	Proto-Italic	wīnom	wine
7	Proto-Indo-European	wóyh₁nom	wine; vine, wine
8	Proto-Indo-European	weh₁y-	to twist, wind, weave, plait; to wrap, enclose,...

via Vietnamese đá

Step	Language	Word	Meaning
1	Vietnamese	đá	rock, stone; ice as used for consumption or...
2	Chinese	肚	—
3	Proto-Sino-Tibetan	l-tjwa	mouth; beak; food; stomach; mouth, beak, food,...

Every word from Proto-Indo-European weh₁y- →