切磋

to compare notes / to learn from one another / to swap pointers

to compare notes; to learn from one another

to cut / to slice / tangent (math)

definitely / absolutely (not) / (scoffing or dismissive interjection) Yeah, right. / Tut! / to grind / close to / eager / to correspond to / see also 反切[fan3 qie4]

deliberate / to polish

lit. cutting and polishing (idiom) / fig. to learn by exchanging ideas or experiences