buccal / buckle [ˈbʌkəl]
buccal – adj. – 1. of or relating to the cheek; 2. of or in the mouth
buckle – n. – 1. a flat often rectangular frame with a hinged pin used for joining the ends of a belt, strap, etc.; 2. a similarly shaped ornament on a shoe, etc.; v. tr. 1. (often foll. by “up”, “on”, etc.) fasten with a buckle; 2. tr. & intr. – give way or cause to give way under longitudinal pressure; crumple up; 3. intr. (often foll. by “under”) – submit under pressure