To learn from each other by discussing or exchanging ideas; to compare notes

to consult, discuss seriously, or exchange views repeatedly in order to reach an agreement

(literary) literally "as if cutting and filing"; used to describe people studying together or polishing each other's skills through mutual discussion and criticism. Derived from the [[诗经|詩經|shi1 jing1]]

(idiom) to learn by exchanging ideas or experiences; originally referring to the processes of cutting and polishing bone, ivory, jade, and stone, it now describes people studying together or discussing a topic deeply to improve their knowledge or skills

to rub and polish jade, stone, or horn; also describes refining an idea or skill through practice and study