potrzebnej

Potrzebnej is a form of the Polish adjective potrzebny, which means "needed" or "necessary." It is not a separate word by itself, but a declined form used with feminine nouns. In Polish, adjectives agree with the gender, number and case of the nouns they modify; potrzebny has different endings in different cases. For feminine singular, the forms include potrzebna (nominative), potrzebną (accusative and sometimes instrumental), and potrzebnej (genitive, dative, and locative). Therefore, potrzebnej is most commonly seen in phrases where the accompanying feminine noun is in genitive, dative, or locative case.

Usage and examples:

- Brak potrzebnej informacji. (There is a lack of the necessary information.) Here, information is informacji in genitive, and potrzebnej describes it.

- Potrzebnej pomocy nie otrzymaliśmy. (We did not receive the needed help.) Pomocy is genitive singular of pomoc.

- Nie mam potrzebnej decyzji. (I do not have the required decision.) Decyzji is genitive singular of decyzja.

- W tej sprawie potrzebnej jestem gotów pomóc. (In this matter I am ready to help what is necessary.) This illustrates a more formal or archaic construction where potrzebnej links to the feminine noun.

Etymology and related forms:

Potrzebny derives from the noun potrzeba, meaning "need" or "necessity." The suffix -ny forms adjectives that describe something as being needed or required. The feminine singular genitive/dative/locative form potrzebnej contrasts with the masculine and neuter forms and with the feminine nominative potrzebna and accusative potrzebną.

In summary, potrzebnej is the feminine singular declined form of potrzebny used with feminine nouns in genitive, dative, or locative cases, conveying the sense of something that is needed or necessary in a given context.