返 means “return, give back”

かえす · kaesu

Also: answer, fade, repay

Kun'yomi (Japanese reading)
かえす, かえる
On'yomi (Chinese reading)
ヘン

JLPT N3 · Taught in grade 3 · 7 strokes

The story

Movement (辶) plus turning back (反): going back the way you came. 返す is to give back, 返事 is a reply sent back, and 返金 is the refund that sends your money home again.

Used in 返す (kaesu, to give back), 返事 (henji, reply), and 返金 (henkin, refund)

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