buckle

باللغة العربية: انْحِنَاء، التِوَاء، كَعْكَة الفَاكِهَة

1. A distortion; a bend, bulge, or kink. (countable) · We can’t use that saw any more. It’s got a buckle in its blade.
2. An upward, elongated displacement of a roof membrane, frequently occurring over deck joints or insulation, which may indicate movement of the roof assembly. (countable, uncountable)
3. Usually preceded by a descriptive word: a cake baked with fresh fruit (often blueberries) and a streusel topping. (US, countable)

الجمع buckles