切磋琢磨 [－－－－]

Jyutping cit3 co1 doek3 mo4
Pinyin qiē cuō zhuó mó

Definitions (CC-CEDICT)
  1. lit. cutting and polishing (idiom)
  2. fig. to learn by exchanging ideas or experiences
Definitions (Wiktionary)
  1. phrase, figuratively, idiomatic
    to learn by exchanging ideas and experiences; friendly competition; improvement by learning from others
  2. phrase, idiomatic
    to carve and polish (bones, horns, ivory and jade)