Where does “mercare” come from?

mercare (Italian) comes from Old Occitan mercar, from Proto-Germanic markōną, from Proto-Germanic markō, from Proto-Indo-European morǵ- — edge, boundary, border; frontier, border.

mercare (Italian): to trade, to deal, to sell; to buy, to purchase;...

Definitions

to trade, to deal, to sell; to buy, to purchase;...

Ancestry of “mercare”, step by step

mercare traces back through two separate lines of ancestry.

via Old Occitan mercar

Step	Language	Word	Meaning
1	Old Occitan	mercar	—
2	Proto-Germanic	markōną	to mark; to notice
3	Proto-Germanic	markō	border, boundary; region, area
4	Proto-Indo-European	morǵ-	edge, boundary, border; frontier, border

via Latin mercor

Step	Language	Word	Meaning
1	Latin	mercor	I trade, deal, sell
2	Latin	merx	merchandise, commodity; goods, wares
3	Proto-Italic	*merks	—

Every word from Proto-Indo-European morǵ- →Every word from Proto-Germanic markō →Every word from Proto-Germanic markōną →