This is the 1687th most frequent Russian word.
активным
The Russian word "активным" translates to "active" in English.
In this sentence, 'активным' is used as an adjective in the instrumental case to describe someone who actively participates.
Он всегда оставался активным участником нашего клуба.
He always remained an active member of our club.
Here, 'активным' is an adjective in the instrumental case describing a required persistent state of activity for success.
Для успеха в спорте важно быть активным и целеустремлённым.
To succeed in sports, it is important to be active and goal-oriented.
In this example, 'активным' is used as an adjective modifying "людям" to describe a characteristic of being vibrant and energetic.