This is the 7210th most frequent Korean word.
줄어들었다
"줄어들었다" means "decreased" or "diminished."
In this sentence, '줄어들었다' is used to describe the reduction in the number of people in a population.
인구가 줄어들었다.
The population has decreased.
Here, '줄어들었다' is indicating a decrease in the quantity of water.
물의 양이 줄어들었다.
The amount of water has decreased.
In this context, '줄어들었다' refers to the reduction in expenses or costs.