This is the 4638th most frequent Korean word.
개선해야
"개선해야" means "must improve" or "need to improve."
The word '개선해야' is used in a formal context to indicate the necessity of improving education systems.
우리는 교육 시스템을 개선해야 합니다.
We must improve the education system.
Here, '개선해야' emphasizes the felt necessity in enhancing service quality in a business context.
서비스 품질을 더욱 개선해야 할 필요성을 느낍니다.
There is a felt need to further improve service quality.
In this sentence, '개선해야' points to personal improvement in health for achieving a better lifestyle.