砕ける

くだける

• to break (into pieces); to be broken; to be smashed v1 vi
• to collapse; to crumble; to decline; to cool (e.g. enthusiasm); to dampen (e.g. one's will to fight) v1 vi
• to become less formal; to throw off reserve; to become affable v1 vi
• to become easy to understand (e.g. a story) v1 vi
• to be worried v1 vi