磋 磋 cuo1
deliberate; to polish

strokes 14
radical
石
石
strokes after radical 10
磋商 磋商 cuo1 shang1
to consult; to discuss seriously; to negotiate; to confer; negotiations; consultations

切磋 切磋 qie1 cuo1
to compare notes; to learn from one another; to swap pointers

切磋琢磨 切磋琢磨 qie1 cuo1 zhuo2 mo2
lit. cutting and polishing (idiom); fig. to learn by exchanging ideas or experiences