■ noun a flat rectangular or oval frame with a hinged pin, used for joining the ends of a belt or strap.
■ verb
1》 fasten or decorate with a ~.
2》 bend and give way under pressure.
3》 ( ~ down ) tackle a task with determination.
Origin
ME: from OFr. bocle , from L. buccula 'cheek strap of a helmet', from bucca 'cheek'; sense 2 is from Fr. boucler 'to bulge'.