This is the 202nd most frequent Korean word.
경제
"경제" means "economy."
In this sentence, '경제' (gyeongje) refers to the academic study of economics.
그녀는 경제 공부를 전공으로 선택했습니다.
She chose the study of economics as her major.
Here, '경제' relates to the overall economy or economic conditions of a country.
국가의 경제 상황이 빠르게 개선되고 있습니다.
The country's economic situation is rapidly improving.
In this sentence, '경제적인' conveys the meaning of being economical or cost-effective.