This is the 3653rd most frequent Polish word.
górnika
"Miner" (referring to a person who works in a mine).
In this sentence, "górnika" is used in the accusative case as the object of the verb "widzieliśmy" (we saw), indicating someone being observed.
Górnika widzieliśmy wczoraj na rynku.
We saw the miner yesterday in the market.
Here, "górnika" is used in the genitive case to denote possession or relationship, referring to the work associated with the miner.
Przyjaciel górnika opowiadał o jego pracy w kopalni.
The miner's friend was talking about his work in the mine.
In this sentence, "górnikowi" (the dative case form of "górnika") is used to indicate the recipient of the action, someone being given water.