扣留

扣留	kòu liú	to detain / to arrest / to hold / to confiscate
扣	kòu	to fasten / to button / button / buckle / knot / to arrest / to confiscate / to deduct (money) / discount / to knock / to smash, spike or dunk (a ball) / to cover (with a bowl etc) / (fig.) to tag a label on sb / (Tw) (loanword) code
扣	kòu	button
留	liú	old variant of 留
留	liú	to leave (a message etc) / to retain / to stay / to remain / to keep / to preserve
留	liú	old variant of 留