This is the 13770th most frequent Russian word.
нижегородское
"Нижегородское" means "of Nizhny Novgorod" or "related to Nizhny Novgorod."
In this sentence, 'нижегородское' is used as an adjective to describe the quality originating from Nizhny Novgorod.
Я купил сувенир с надписью 'Нижегородское качество'.
I bought a souvenir with the label 'Nizhny Novgorod quality'.
Here, 'нижегородское' is used to modify 'озеро', indicating that the lake is associated with Nizhny Novgorod.
Нижегородское озеро славится своей красотой и чистотой.
The Nizhny Novgorod lake is famous for its beauty and cleanliness.
In this sentence, 'нижегородское' refers to an entity or organization related to or located in Nizhny Novgorod.