zollverein (n.)youdaoicibaDictYouDict[zollverein 词源字典]
1843, from German Zollverein, literally "customs union," from Zoll "toll" (see toll (n.)) + Verein "union," from vereinen "to unite," from ver- + ein "one" (see one).[zollverein etymology, zollverein origin, 英语词源]