Questions & Answers about Ta mała firma ma problem z ZUS-em.
Why is there a hyphen in ZUS-em?
When declining a Polish acronym, you must use a hyphen to separate the capitalized letters from the lowercase grammatical ending. Because ZUS is following the preposition z (with), it requires the instrumental case ending -em.
How do we know that ZUS should be treated as a masculine noun?
Acronyms in Polish take their gender from their phonetic sound if they can be read as a word. Because ZUS is pronounced as a single syllable (/zus/) rather than spelled out letter-by-letter (Z-U-S), and it ends in a consonant sound, it declines just like a regular masculine noun.
If ZUS stands for a longer phrase, do we use the gender of the words inside the acronym?
Sometimes, but the pronunciation rule comes first. Acronyms pronounced letter-by-letter (like UE for Unia Europejska) take the gender of their underlying main noun. However, acronyms pronounced as a regular word (like ZUS) take the gender of their final sound. Since ZUS ends in a consonant, it acts as a masculine noun regardless of what words it stands for.
Why does the noun problem not have a special case ending here?
The noun problem is in the accusative case because it is the direct object of the verb ma (has). For masculine inanimate nouns like problem, the accusative form is identical to the basic dictionary form (the nominative case).