弹琴

to play or strum a lute or other stringed instrument

crossball / bullet / shot / shell / ball

to pluck (a string) / to play (a string instrument) / to spring or leap / to shoot (e.g. with a catapult) / (of cotton) to fluff or tease / to flick / to flip / to accuse / to impeach / elastic (of materials)

guqin 古琴[gu3 qin2] (a type of zither) / musical instrument in general

variant of 琴[qin2], guqin or zither

to talk nonsense / to behave like a fool

lit. to play the lute to a cow (idiom) / fig. offering a treat to an unappreciative audience / to cast pearls before swine / caviar to the general / to preach to deaf ears / to talk over sb's head