替 means “replace, swap”

かえる · kaeru

Also: exchange, spare, substitute, per-

Kun'yomi (Japanese reading)
かえる, かえ-, かわる
On'yomi (Chinese reading)
タイ

JLPT N2 · Taught in secondary school · 12 strokes

The story

Two men (夫夫) over a speaking mouth (曰): picture one worker saying my turn and taking the other's place. 替える is to swap, 両替 is changing money, and a 日替わり定食 is the lunch special that changes every day.

Used in 着替える (kigaeru, to change clothes), 両替 (ryougae, money exchange), and 為替 (kawase, exchange rate)

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Readings from KANJIDIC2, © EDRDG, CC BY-SA.