This is the 11473rd most frequent Russian word.
долгая
"Долгая" means "long" or "lengthy" in English, typically referring to time.
In this sentence, 'долгая' describes the duration of the walk, indicating that it lasted a long time.
Это была долгая прогулка.
It was a long walk.
Here, 'долгие' (the plural form of 'долгая') modifies 'часы' (hours), denoting an extended period spent in an activity.
Мы провели долгие часы за беседой.
We spent long hours chatting.
In this sentence, 'долгие' describes 'годы' (years), emphasizing an extended time frame over which an action occurred.