This is the 9859th most frequent Polish word.
aktorką
"Actress" (instrumental case in Polish).
The word 'aktorką' is used as an instrumental case form of 'aktorka' (actress) in Polish and follows the verb 'została' (became) to denote what someone has become.
Moja siostra została aktorką.
My sister became an actress.
Here, 'aktorką' is in the instrumental case used with the verb 'była' (was) to describe her role or occupation in a specific context.
Spotkałem ją na premierze, gdzie była aktorką w głównej roli.
I met her at the premiere, where she was an actress in the leading role.
In this sentence, 'aktorką' again is in the instrumental case paired with 'była' in a subjunctive form to express aspiration or desire for a future state involving the profession of actress.