This is the 13617th most frequent German word.
drittälteste
"Third oldest."
In this sentence, 'drittälteste' is used to describe the rank of Cologne among the oldest metropolises in Germany.
Die Stadt Köln ist die drittälteste Großstadt Deutschlands.
The city of Cologne is the third-oldest metropolis in Germany.
Here, 'drittälteste' is employed to indicate the relative age of the cat compared to the other animals living in the house.
Unsere Katze ist das drittälteste Tier im Haus.
Our cat is the third-oldest animal in the house.
In this instance, 'drittälteste' refers to the age-based ranking of books within a specific collection.