Pravilnu
Pravilnu is a grammatical form found in several South Slavic languages that derive from the root prav- meaning right, proper, or correct. It is not a standalone concept with a fixed sense; rather, it is the feminine singular accusative form of the adjective meaning "correct" or "proper" used to modify a feminine noun.
In standard usage, pravilnu appears before a feminine noun in the accusative case. A common illustrative phrase
Etymology traces pravilnu to the Slavic root prav- or prav- meaning right, straight, or proper. Related words
Usage notes emphasize that the exact form and agreement depend on language variety and grammatical context.
See also: pravilan (the base form meaning “correct” or “proper” in masculine), pravilna (feminine nominative), pravila