This is the 9167th most frequent Russian word.
серебрянского
"Серебрянского" is the genitive singular or adjectival form of a proper noun related to "Серебрянск" (a place name). It means "of/from Serebryansk."
Here, 'серебрянского' is an adjective modifying 'медведя' indicating the material or color of the bear in the collection.
Я купил серебрянского медведя для коллекции.
I bought a silver bear for my collection.
The word here modifies 'доме,' describing its appearance or construction material.
Иван живет в серебрянского доме на окраине города.
Ivan lives in a silver house on the outskirts of the city.
In this sentence, 'серебрянского' relates to 'дерева,' describing its metallic or silver-painted design.