復 means “return, restore, repeat”

ふく · fuku

Also: return to, revert, resume

Kun'yomi (Japanese reading)
また
On'yomi (Chinese reading)
フク

JLPT N2 · Taught in grade 5 · 12 strokes

The story

Steps (彳) and a foot heading back the way it came (复): going over old ground again. 往復 is a round trip, 回復 is recovering, and every student knows 復習, going back over the day's lesson so it sticks.

Used in 復習 (fukushuu, review), 往復 (oufuku, round trip), and 回復 (kaifuku, recovery)

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