卸扣

卸扣	xiè kòu	shackle (U-shaped link)
卸	xiè	to unload / to unhitch / to remove or strip / to get rid of
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