interchange

a junction of highways on different levels that permits traffic to move from one to another without crossing traffic streams

mutual interaction; the activity of interchanging or reciprocating

reciprocal transfer of equivalent sums of money especially the currencies of different countries

• “he earns his living from the interchange of currency”

give to, and receive from, one another

• “Would you change places with me?”
• “We have been exchanging letters for a year”

cause to change places

• “interchange this screw for one of a smaller size”

reverse (a direction, attitude, or course of action)