This is the 5039th most frequent Russian word.
межрегиональных
"Interregional."
The word 'межрегиональных' is used as an adjective describing 'connections' (связей), indicating that these connections span across different regions.
Межрегиональных связей становится все больше благодаря новым технологиям.
Interregional connections are increasing due to new technologies.
Here, 'межрегиональных' modifies 'trade relations' (торговых отношений), indicating that these relations involve multiple regions.
Правительство поддерживает развитие межрегиональных торговых отношений.
The government supports the development of interregional trade relations.
In this sentence, 'межрегиональных' describes 'organizations' (организаций), emphasizing their interregional nature.