This is the 17533rd most frequent Polish word.
zbierała
"Zbierała" means "she was collecting" or "she was gathering" in English.
In this sentence, 'zbierała' is used to indicate the action of gathering or collecting something (flowers) in the past.
Anna zbierała kwiaty na łące.
Anna was picking flowers in the meadow.
Here, 'zbierała' refers to the action of people assembling or coming together.
Zbierała się grupa studentów przed biblioteką.
A group of students was gathering in front of the library.
In this context, 'zbierała' signifies the act of collecting or raising money for a purpose.