tariff, a government tax on imports or exports.
tariff - Definitions from Dictionary.com
1. an official list or table showing the duties or customs imposed by a government on imports or exports.
2. the schedule or system of duties so imposed.
3. any duty or rate of duty in such a list or schedule.
4. any table of charges, as of a railroad, bus line, etc.
5. bill; cost; charge.
tariff, 1591, "arithmetical table," from It. tariffa, M.L. tarifa "list of prices, book of rates," from Arabic ta'rif "information, notification, inventory of fees to be paid," verbal noun from arafa "to make known." Meaning "official list of customs duties on imports or exports" is from 1592; sense of "classified list of charges made in a business" is recorded from 1757.
Online Etymology Dictionary