English 'market' comes through Old North French from Latin 'mercātus' (trade, marketplace), from 'merx' (goods, wares), from PIE *merḱ- (to seize) — the same root that named Mercury (god of trade), produced 'merchant' and 'merchandise,' and even gave us 'mercy' (originally a payment, a reward).
A regular gathering of people for the purchase and sale of provisions, livestock, or other commodities; an area or arena in which commercial dealings are conducted.
From Old North French 'market' (a marketplace, the act of buying and selling), from Latin 'mercātus' (trade, traffic, commerce; a marketplace, the space and act of exchange), a noun formed from 'mercārī' (to trade, to deal, to buy), from 'merx' (merchandise, goods offered for sale, wares). The proposed PIE root for 'merx' is *merḱ- (to seize, to take hold) — which would make merchandise literally 'that which is seized' — but the etymology remains partly disputed. The same root underlies 'Mercury' (Mercurius), the Roman god of commerce,