This is the 5052nd most frequent Polish word.
pozostała
"Pozostała" means "remaining" or "left" in English.
Here, 'pozostała' is used in its singular feminine past tense form of 'pozostać', meaning 'remained' or 'left', denoting what is left over from a previous state.
W magazynie pozostała jeszcze jedna książka.
There is still one book left in the warehouse.
In this sentence, 'pozostała' is an adjective derived from 'pozostać', describing the portion of the group that remains.
Pozostała część grupy kontynuowała podróż.
The remaining part of the group continued the journey.
Here, 'pozostała' conveys 'remained' in its feminine singular past tense form, describing the state of the field being left in silence.