磋polishStrokes15OnサKunみがくParts石stone差distinctionWords with 磋切磋せっさ · sessaworking hard; applying oneself; cultivating one's character (through hard work or study)切磋琢磨せっさたくま · sessatakumadiligent application (to work or study); cultivating one's character by studying hard; mutual encouragement (to improve)Study it in Yanamino
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