This is the 257th most frequent Croatian word.
djecu
The Croatian word "djecu" means "children" (accusative form).
In this sentence, 'djecu' is in the accusative case, functioning as the direct object of the verb 'vidim', to denote what is being seen.
Vidim djecu u parku.
I see the children in the park.
Here, 'djeco' is the vocative case, used for addressing or calling the children directly.
Djeco, dođite ovamo!
Children, come here!
In this sentence, 'djecu' is in the accusative case, functioning as the object of the preposition 'za' to indicate whom care is directed toward.