The elderly man developed a contracture in his leg muscles due to prolonged bed rest.

contracture 是名词，由动词 contract（收缩）加上名词后缀 -ure 构成。contract 来自拉丁语，意为"收缩、紧缩"，-ure 表示动作或状态的结果。contracture 在医学上指肌肉或关节因长期不活动或疾病导致的"挛缩"，即肌肉或肌腱持续收缩导致关节活动受限的状态。