This is the 3196th most frequent Korean word.
고질적인
Chronic or persistent.
고질적인 in this sentence refers to a persistent or chronic problem, emphasizing the difficulty in resolving such issues due to their long-standing nature.
고질적인 문제는 해결하기 어려운 경우가 많습니다.
Chronic issues are often difficult to resolve.
Here, 고질적인 describes habitual or recurrent mistakes, indicating a pattern that needs effort to break.
그는 고질적인 실수를 반복하지 않기로 결심했습니다.
He resolved not to repeat chronic mistakes.
In this context, 고질적인 is used to characterize a long-term illness, highlighting its enduring and recurring impact on the individual's health.