This is the 4660th most frequent Polish word.
naczepę
"Naczepę" means "semi-trailer" in English.
Here, 'naczepę' is used to indicate the object that is being bought, i.e., a trailer for a truck, in accusative case as it is the direct object of the verb 'kupiłem' (I bought).
Kupiłem nową naczepę do mojego tira.
I bought a new trailer for my truck.
In this sentence, 'naczepę' is in the accusative case, denoting the thing onto which the action of loading (załadować) is directed.
Musimy załadować towar na naczepę przed wieczorem.
We need to load the goods onto the trailer before evening.
Here, 'naczepę' appears in the accusative case, as the direct object of the verb 'zaparkuj' (park).