Other forms: trading; trades; traded
When Bobby has peanut butter but wants bologna and Billy has bologna but wants peanut butter––they can make a trade. Trade also means a set of job skills––to learn a trade means to train for a certain job.
The concept of trading––or bartering––forms the basis of modern civilization––it brings along division of labor, literacy, urbanization. Thinking in those terms you can see how tradespeople––those trained in trades end up essentially trading their services, with money being introduced when the barter system breaks down or becomes too complex.
Close your vocabulary gaps with personalized learning that focuses on teaching the words you need to know.