This is the 19121st most frequent Korean word.
아주머니가
"아주머니가" means "aunt (subject particle)" or "middle-aged woman (subject particle)" in Korean.
In this sentence, '아주머니가' refers to a respectful term for addressing a middle-aged woman who is performing the action (selling).
아주머니가 과일을 팔고 있습니다.
The lady is selling fruit.
Here, '아주머니가' again refers to a middle-aged woman, symbolizing respect and indicating she is the subject arriving at the location.
아주머니가 우리 집에 오셨습니다.
The lady came to our house.
In this instance, '아주머니가' defines the woman who is the subject responsible for caring for a child.