This is the 1415th most frequent Polish word.
weszła
"Weszła" means "she entered" in English.
Here, 'weszła' metaphorically indicates the implementation or commencement of an action or state.
Jej decyzja weszła w życie natychmiast.
Her decision came into effect immediately.
'Weszła' here is the past tense of 'wejść', meaning 'to enter', in the 3rd person singular feminine.
Ona weszła do pokoju.
She entered the room.
In this context, 'weszła' refers to ascending or successfully reaching a high point.