訓 き(く) ・ 音 リ
Sino-Vietnamese: lợi
Rice plant 禾 plus knife 刂: harvesting grain with a sharp blade brings profit, so it means advantage or benefit (Han Viet loi, as in loi ich = benefit).
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図書館をよく利用します。 (としょかんをよくりようします)
I often use the library.