This is the 15502nd most frequent German word.
vierjährigen
"Vierjährigen" means "four-year-old."
Here, 'vierjährigen' is used as an attributive adjective in the accusative case modifying the noun 'Hund', denoting the dog's age (four years old).
Mein vierjährigen Hund liebt es zu spielen.
My four-year-old dog loves to play.
In this sentence, 'vierjährigen' describes 'Jungen' as an attributive adjective in the accusative case, focusing on the boy's age.
Das Buch erzählt eine Geschichte über einen vierjährigen Jungen.
The book tells a story about a four-year-old boy.
Here, 'vierjährigen' modifies 'Studium', indicating the duration of the study, used in the dative case after a prepositional phrase.