かえす
to return, to repay
Back the way you came, carrying the thing. Two cases かえす of books going into the library slot: かえす.
Careful: 帰る かえる is you going home and 変える かえる is altering something. 返す is giving a thing back.
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Emaki is not affiliated with, or endorsed by, Kaishi 1.5k or its authors. The word, reading and meaning come from the Kaishi 1.5k deck, used with their permission. The mnemonic, the note and the kanji breakdown are original work, published under CC BY-SA 4.0.