the period of life when you are old and not always able to think clearly 年老昏聩；年老糊涂 - in somebody's dotage
I need you to look after me in my dotage. 我需要你照顾我。 The women now share their dotage in the old folks' home. 现在，妇女们在老人家中分享她们的爱。
Word Originlate Middle English: from dote + -age.- in somebody's dotage