This is the 10096th most frequent Korean word.
과소비를
"과소비를" means "excessive spending" in English.
The word '과소비를' is used as the object of the verb '많이 해서', indicating that the excessive spending is the action taken this month.
나는 이번 달에 과소비를 많이 해서 절약해야겠다.
I spent excessively this month, so I should save money.
The word '과소비를' is again the object, here it relates to the action of '줄이는', placing emphasis on minimizing this act of excessive spending.
과소비를 줄이는 방법에 대해 생각해 봐야 해요.
We need to think about ways to reduce excessive spending.
The word '과소비를' here emphasizes the act of overspending, and the negative form of the action '하지 않는' denotes avoidance of this act.