noun
Refers to the act of exchanging one thing for another, often in a transactional or replacement context. Commonly used in phrases like 換わりをする (to serve as a substitute) or 換わりに (in exchange for).
彼の換わりに私が会議に出た。
I attended the meeting in his place.
この商品は換わりがきかない。
This product is irreplaceable.