Where does “đồng xu” come from?

đồng xu (Vietnamese) comes from Vietnamese xứ, from French sou, from Latin solidus, from Proto-Italic soliðos, from Proto-Indo-European solh₂-i-dʰ-o-s, from Proto-Indo-European solh₂- — whole.

đồng xu (Vietnamese): coin

Definitions

coin

Ancestry of “đồng xu”, step by step

đồng xu traces back through two separate lines of ancestry.

via Vietnamese xứ

Step	Language	Word	Meaning
1	Vietnamese	xứ	a land
2	French	sou	sou; money; cash; cent
3	Latin	solidus	solid; A solidus: a Roman ~23-carat gold coin...
4	Proto-Italic	soliðos	—
5	Proto-Indo-European	solh₂-i-dʰ-o-s	entire
6	Proto-Indo-European	solh₂-	whole

via Vietnamese đồng

Step	Language	Word	Meaning
1	Vietnamese	đồng	field; medium; sorcerer; copper
2	Vietnamese	đất	earth; soil; dirt; land
3	Proto-Vietic	tət	—

Every word from Proto-Indo-European solh₂- →Every word from Proto-Indo-European solh₂-i-dʰ-o-s →Every word from Proto-Italic soliðos →