buckle
     n 1: fastener that fastens together two ends of a belt or strap;
          often has loose prong
     2: a shape distorted by twisting or folding [syn: {warp}]
     v 1: fasten with a buckle or buckles [syn: {clasp}] [ant: {unbuckle}]
     2: fold or collapse; "His knees buckled" [syn: {crumple}]
     3: bend out of shape, as under pressure or from heat; "The
        highway buckled during the heatwave" [syn: {heave}, {warp}]
Source: WordNet® 2.0