This is the 12649th most frequent Russian word.
концессионное
"Концессионное" means "concessional," relating to a concession, typically in the context of agreements or rights granted.
The word 'концессионное' is used as an adjective describing 'соглашение', meaning 'related to concession'.
Концессионное соглашение стало ключевым для развития инфраструктуры.
The concession agreement became key for infrastructure development.
Here, 'концессионная' describes 'модель', utilizing its adjectival form to denote association with a concession.
Основой для инвестиции была концессионная модель.
The basis for the investment was a concession model.
In this sentence, 'концессионного' qualifies 'управления', indicating management carried out through a concession agreement.