This is the 6256th most frequent Russian word.
удивилась
"Was surprised" or "was amazed."
Here, 'удивились' illustrates a collective sense of astonishment regarding an accomplishment.
Они удивились, что смогли это сделать.
They were surprised that they were able to do it.
The word 'удивилась' here expresses an emotional reaction of surprise upon discovering new information.
Она удивилась, узнав об этом.
She was surprised to learn about this.
In this context, 'удивилась' conveys a personal reaction to an unexpected situation at a specific event.