切磋琢磨 [ㄑㄧㄝ ㄘㄨㄛ ㄓㄨㄛˊ ㄇㄛˊ; qie1 cuo1 zhuo2 mo2]
  gradual improvement by slow polishing (idiom); fig. education as a gradual process
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  切磋琢磨
  せっさたくま
  noun (common) (futsuumeishi)
  noun or participle which takes the aux. verb suru
  cultivate one's character by studying hard
  diligent application
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