Where does “toa thuốc” come from?

toa thuốc (Vietnamese) comes from Vietnamese toà, from French toi, from Middle French toi, from Old French tei, from Latin tē, from Latin tū, from Proto-Italic tū, from Proto-Indo-European túh₂ — you, thou.

toa thuốc (Vietnamese): prescription

Definitions

prescription

Ancestry of “toa thuốc”, step by step

toa thuốc traces back through two separate lines of ancestry.

via Vietnamese toà

Step	Language	Word	Meaning
1	Vietnamese	toà	Short for toà án; your Honor
2	French	toi	You
3	Middle French	toi	Alternative form of toy
4	Old French	tei	Alternative form of toi
5	Latin	tē	—
6	Latin	tū	you (singular); thou
7	Proto-Italic	tū	you
8	Proto-Indo-European	túh₂	you, thou

via Vietnamese thuốc

Step	Language	Word	Meaning
1	Vietnamese	thuốc	medicine; medicament; drug; Short for thuốc lá;...
2	Chinese	毒	—
3	Proto-Sino-Tibetan	duk ~ tuk	poison; poisonous, toxic; to poison

Every word from Proto-Indo-European túh₂ →Every word from Proto-Italic tū →Every word from Latin tū →