To distort or collapse under physical pressure; especially, of a slender structure in compression.

To make bend; to cause to become distorted.

To give in; to react suddenly or adversely to stress or pressure (of a person).

“It is amazing that he has never buckled after so many years of doing such urgent work.”

To fasten using a buckle.

To unite in marriage.

The act of fastening a buckle.

A folding into hills and valleys.

The action of collapsing under pressure or stress.

Wavy; curly, as hair.