This is the 16482nd most frequent Polish word.
widziała
"Widziała" means "she saw."
In this sentence, the word "widziała" is the past tense, feminine singular form of the verb "widzieć" (to see), indicating that Maria (a female subject) observed the sunset in the past.
Maria widziała wczoraj piękny zachód słońca.
Maria saw a beautiful sunset yesterday.
Here, "widziała" occurs in a negated past tense form, indicating that the reference subject (third person feminine) has not experienced seeing the movie in the past.
Nie widziała tego filmu, więc chciałaby go obejrzeć.
She has not seen this movie, so she would like to watch it.
This sentence uses "widziała" reflexively in a question, meaning "did see oneself," implying a mutual encounter or meeting with her friend.