barter

noun
  1. The act or system of exchanging goods or services directly for other goods or services without using money. noun
    In ancient times, people used barter as a primary method of trade.
    The barter system can be advantageous in situations where currency is unstable.
  2. To exchange goods or services directly for other goods or services without using money. verb
    Farmers often barter their produce for other goods they need.
    He bartered his collection of rare books for a vintage guitar.