senility
🇺🇸
/səˈnɪləti/
🇬🇧
/səˈnɪləti/
The state of being old and having trouble remembering things or thinking clearly.
My grandmother's increasing senility has made day-to-day tasks difficult for her.
我祖母日益增加的老年痴呆使得她的日常任务变得困难。