This is the 6040th most frequent Polish word.
adamskiego
"Adamskiego" is the genitive or possessive form of "Adamski," a Polish surname, meaning "of Adamski" or "Adamski's."
Genitive case indicating possession or relation.
Widzę dom Adamskiego.
I see Adamski's house.
Instrumental case used after the preposition 'z' ('with').
Rozmawiałem z panem Adamskim o jego planach.
I spoke with Mr. Adamski about his plans.
Accusative case indicating the doer of the action.