这位老人在晚年对宠物的溺爱简直到了无以复加的地步。

The old man's dotage on his pet was almost excessive in his later years.

dotage 是名词，来自动词 dote（溺爱、过分喜爱）加上名词后缀 -age。dote 本身就有"过分喜爱、溺爱"的意思，加上 -age 后缀后表示"溺爱的状态或时期"。 在句中，dotage 特指老人晚年对宠物表现出的过度宠爱状态，带有因年老而变得过分依恋的意味。