noun
single market
Economic term for a unified market where goods, services, capital, and people move freely, often referring to the European Single Market.
EUの単一市場は、加盟国間の貿易障壁を取り除いた。
The EU single market removed trade barriers between member states.
共同市場 (common market) is a broader term that may include a single market but also implies common external trade policies; 単一市場 emphasizes internal integration without internal borders.
Compound of 単一 (single, unitary) and 市場 (market). A straightforward modern term with no obscure historical derivation.