zollverein (n.)

"tax, fee," Old English toll "impost, tribute, passage-money, rent," variant of toln, cognate with Old Norse tollr, Old Frisian tolen, Old High German zol, German Zoll, probably an early Germanic borrowing from Late Latin tolonium "custom house," classical Latin telonium "tollhouse," from Greek teloneion "tollhouse," from telones "tax-collector," from telos "duty, tax, expense, cost" (from suffixed form of PIE root *tele- "to lift, support, weigh;" see extol) For sense, compare finance.

On another theory it is native Germanic and related to tell (v.) on the notion of "that which is counted." Originally in a general sense of "payment exacted by an authority;" meaning "charge for right of passage along a road" is from late 15c.