HSK C3/W3
Correct

姑

/ gū / 
Strokes

Definition

paternal aunt/husband's sister/husband's mother (old)/nun/for the time being (literary)

Example

As a Noun
husband's mother; mother-in-law
As a Noun
husband's sister; sister-in-law
As a Noun
father's sister; aunt
As a Noun
(country) girl
As a Noun
nun; priestess