This is the 16774th most frequent Polish word.
wydobytej
"Extracted" or "mined."
In this sentence, "wydobytej" is used as an adjective in the genitive case, agreeing with "ropy" (oil), and describes oil that has already been extracted.
Wydobytej ropy używamy jako źródła energii.
We use the extracted oil as a source of energy.
Here, "wydobytej" functions as an adjective describing "soli" (salt), emphasizing the salt which has been brought out from the mine.
Kopalnia chlubi się jakością wydobytej soli.
The mine prides itself on the quality of the extracted salt.
In this example, "wydobytej" again serves as an adjective in the genitive case, agreeing with "rudy" (ore), and specifies the ore that has been extracted.