What is the term for a form of trade that takes place between people who may not understand each other's languages or do not trust each other?

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Silent trade, also known as dumb barter or gesture trade, involves trading between individuals or communities who may not understand each other's languages or may not trust each other. The trade is conducted without verbal communication but through various gestures, signs, or symbols. This form of trade was common in earlier times and was often used in trading across different regions and cultures.

What Is the Term for a Form of Trade That