To tie or make a knot in a string, wire, or ribbon.

a metal or plastic press stud or snap button used to fasten clothes

snap fastener; press stud; popper; colloquially also called [[子母扣儿|子母扣兒|zi3 mu3 kou4 r5]]

a veiled or covered button on clothing; a snap fastener that is not visible from the outside

A tight knot that is difficult to undo; a dead knot

knot that can be easily untied; slipknot

bowknot or butterfly knot

To unfasten a button or untie a knot.

to be stubborn; to be set in one's ways; to cling to an idea without flexibility

A type of metal button consisting of a male and female pair that snap together; snap; press stud

the hook and eye or top button used to fasten the collar of a high-necked uniform or jacket