This is the 590th most frequent Czech word.
zpěvačka
Female singer.
Here, 'zpěvačka' is used as the subject of the sentence, referring to a female singer performing an action.
Zpěvačka zazpívala krásnou píseň.
The singer sang a beautiful song.
In this sentence, 'zpěvačku' is in the accusative case, indicating the direct object of the verb, also referring to a female singer.
Poznali jsme známou zpěvačku na koncertu.
We met a famous singer at the concert.
Here, 'zpěvačkou' is used in the instrumental case, describing the role or state one desires to achieve.