Focus on the pronunciation of buckle
English definition of “buckle”
/ˈbʌk·əl/ v [I/T] (BEND)
› to bend or become uneven, often as a result of force, heat, or weakness: [I] After eight hours of hiking, our knees were beginning to buckle. › Someone who buckles or buckles under gives in to something, such as pressure or opposition: [I] The judge threatened her with jail, but she refused to buckle and would not say where she got the information.