擦撞

擦撞	cā zhuàng	to sideswipe (a car etc) / to generate (sparks) by striking a flint; (fig.) to produce (sth novel) through interaction
擦	cā	to rub; to scratch / to wipe; to polish / to apply (lipstick, lotion etc) / to brush (past) / to shred (a vegetable etc)
撞	zhuàng	to knock against / to bump into / to run into / to meet by accident