This is the 15816th most frequent Russian word.
продолжительную
"Продолжительную" means "prolonged" or "long-lasting" in English.
Here, 'продолжительную' is used as an adjective to describe a walk that is prolonged or extended in duration.
Мы выбрали продолжительную прогулку по городу.
We chose an extended walk around the city.
In this example, 'продолжительными' is used to describe projects that require a long duration or continuous effort.
Она занимается продолжительными проектами на работе.
She works on prolonged projects at her job.
In this sentence, 'продолжительного' is used to describe the waiting as continuing for a significant period.