琢磨

to carve and polish (jade) / to polish and refine a literary work

to ponder / to mull over / to think through / Taiwan pr. [zhuo2 mo2]

to cut (gems)

used in 琢磨[zuo2 mo5] / Taiwan pr. [zhuo2]

to rub / to grind / to polish / to sharpen / to wear down / to die out / to waste time / to pester / to insist

grindstone / to grind / to turn round

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