This is the 13132nd most frequent Russian word.
межрегионального
"Interregional" or "between regions."
Here, 'межрегионального' is used as an adjective to describe the type of conference, indicating that it is organized between different regions.
Мы участвуем в межрегионального конференции о сохранении экологии.
We are participating in the interregional conference on ecology preservation.
In this sentence, 'межрегионального' acts as a modifier within a noun phrase, emphasizing the cooperative actions between regions.
В межрегионального сотрудничества важна взаимная поддержка.
In interregional cooperation, mutual support is important.
The usage of 'межрегионального' in this case highlights the scope or significance of the projects, referring to their impact across multiple regions.