This is the 755th most frequent Serbian word.
цвећа
Flowers.
In this sentence, 'цвећа' is in the Genitive case, used to indicate the source of the fragrance.
Мирис цвећа испуњава собу.
The fragrance of flowers fills the room.
Here, 'цвећа' is in the Genitive case, used to describe something intended to hold flowers.
Купио сам вазу за цвећа.
I bought a vase for flowers.
In this example, 'цвећа' is in the Genitive case, used after the preposition 'пуна' (full of).