próbna
Próbna is the feminine form of the Polish adjective próbny, which means related to a trial, test, or provisional nature. It is derived from the noun próba, meaning a trial or attempt. In Polish, adjectives agree with the gender, number, and case of the nouns they modify, so próbny becomes próbna when describing feminine singular nouns.
In everyday usage, próbna typically appears in noun phrases to indicate a test version or an introductory,
Grammatically, próba acts as the root meaning “trial” or “attempt,” while -na is a typical feminine adjective