buckle

(noun, verb)

noun

1. fastener that fastens together two ends of a belt or strap; often has loose prong

Definition categories: man–made, fastener, fastening, fixing, holdfast

2. a shape distorted by twisting or folding

Similar word(s): warp

Definition categories: shape, distortion

verb

1. fasten with a buckle or buckles

Similar word(s): clasp

Definition categories: contact, fasten, fix, secure

2. fold or collapse

- His knees buckled

Similar word(s): crumple

Definition categories: contact, break, collapse, founder, give

3. bend out of shape, as under pressure or from heat

- The highway buckled during the heat wave

Similar word(s): heave, warp

Definition categories: change

Sentences with buckle as a verb:

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