This is the 13303rd most frequent German word.
austauschen
"To exchange, replace, or swap."
In this sentence, "austauschen" is used in the sense of replacing one item with another.
Wir können die Batterien in der Fernbedienung austauschen.
We can replace the batteries in the remote control.
Here, "austauschen" refers to the mutual sharing of thoughts or ideas between people.
Lass uns während der Pause Ideen austauschen.
Let's exchange ideas during the break.
This sentence exemplifies the use of "austauschen" to describe substituting something that is no longer usable with a functional equivalent.