This is the 8014th most frequent Turkish word.
köydeki
"In the village" or "of the village."
In this sentence, 'köydeki' is used as an adjective phrase to specify the location of 'the house,' indicating it is 'in the village.'
Köydeki ev çok eski, ama içinde güzel anılar saklı.
The house in the village is very old, but it holds beautiful memories.
Here, 'köydeki' describes the subject 'people,' specifying that the people mentioned live in or are associated with the village.
Köydeki insanlar genelde birbirlerine yardım eder.
People in the village generally help each other.
In this case, 'köydeki' modifies 'festivals,' contextualizing that the festivals referred to occur within the village.