卸扣

shackle (U-shaped link)

to unload / to unhitch / to remove or strip / to get rid of

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

button