Potrzebnego
Potrzebnego is the genitive singular form of the Polish adjective potrzebny, which means “needed” or “necessary.” This form is used when the noun it modifies is in genitive case and masculine singular or neuter singular. In other cases, the adjective takes a different form: for feminine genitive singular it is potrzebnej, and for plural genitive it is potrzebnych.
In Polish grammar, adjectives agree with the noun they describe in gender, number, and case. Therefore, potrzebnego
Etymologically, potrzebnego derives from the noun potrzeba, meaning “need” or “necessity,” with the adjective suffix -ny,
Usage notes: potrzebnego is most common in written Polish, formal contexts, and in phrases expressing necessity,