This is the 15312th most frequent Polish word.
skończyła
"Finished" or "ended."
The word 'skończyła' is the third person singular past tense form of the verb 'skończyć' (to finish), indicating that Anna completed her work.
Anna skończyła swoją pracę wcześniej.
Anna finished her work earlier.
Here, 'skończyła' is paired with 'się', forming a reflexive construction which works with 'film' (movie), acknowledging its completion.
Film skończyła się zaraz po północy.
The movie finished just after midnight.
In this sentence, 'skończyła' denotes the completing of the activity 'rozmawiać' (to speak/talk) by the subject 'ona' (she).