to exchange
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to exchange
To give something away and receive something else in return; to make an exchange or trade.
Im Laden kann man sein altes Smartphone gegen einen Gutschein für ein neues Modell eintauschen.
At the store, you can exchange your old smartphone for a voucher toward a new model.
'Eintauschen' (to exchange) is a separable verb. The prefix 'ein-' comes at the end in a main clause, the verb stays together in a subordinate clause, and in the infinitive with 'zu', 'zu' goes in the middle.
Ich tausche meine alten Bücher gegen neue ein.
I exchange my old books for new ones.
The structure for an exchange is almost always: 'etwas (Akkusativ) gegen etwas anderes (Akkusativ) eintauschen' (to exchange something for something else). The preposition 'gegen' (for/against) is essential here.
Sie können Ihre Treuepunkte gegen einen Einkaufsgutschein eintauschen.
You can exchange your loyalty points for a shopping voucher.
Old or used things are often exchanged, for example 'ein altes Handy eintauschen' (to trade in an old phone). But you can also exchange abstract things like 'Punkte' (points) or 'Meilen' (miles) for rewards.
Beim Kauf eines neuen Laptops konnte ich mein altes Gerät eintauschen und bekam einen Rabatt.
When buying a new laptop, I was able to trade in my old device and got a discount.
to change / switch
Both words can express an exchange. Wechseln generally means that something is replaced by something else; eintauschen emphasizes that you give something away and receive something else in return. If the item received in return is important as the result of the exchange, eintauschen is more precise.
Für die Reise tauschte ich mein altes Fahrrad gegen ein zuverlässigeres ein.
For the trip, I traded in my old bicycle for a more reliable one.
Für die Reise wechselte ich mein altes Fahrrad gegen ein zuverlässigeres.
For the trip, I changed my old bicycle for a more reliable one.
