"senility" in Chinese (Simplified)
老年痴呆衰老（指精神或身体机能衰退）
Definition
老年痴呆是由于年老导致的精神或身体能力退化的状态，例如记忆力丧失或意识混乱。
Usage Notes (Chinese (Simplified))
多用于医学或正式场合，描述因年老导致的退化；日常语境中用词需注意礼貌。常与“痴呆症”（更具体医学术语）混淆。
Examples
Senility can cause forgetfulness in elderly people.
**老年痴呆**会导致老年人健忘。
Doctors watched for signs of senility in their patients.
医生们观察病人是否有**老年痴呆**的迹象。
He worried that his grandmother was showing senility.
他担心奶奶出现了**老年痴呆**的表现。
Many people fear developing senility as they age.
许多人害怕随着年龄增长出现**衰老**。
Symptoms of senility aren't always obvious at first.
**老年痴呆**的症状一开始并不总是明显的。
His forgetfulness was just a part of his senility, not something dangerous.
他的健忘只是**衰老**的一部分，不是什么危险的事情。