研けん磨ま材ざいMeaningsNoun1. abrasivesKanji used研refine磨polish材raw materialsComposed of研けん磨まgrinding; polishing; refining (a skill, knowledge, etc.); applying oneself (to study); disciplining oneselfNoun材ざいwood; lumber; timber; (raw) material; stuff; talent; ability; capable personNoun