This is the 19668th most frequent Korean word.
얼룩진
Stained; smudged; blotched.
Here, "얼룩진" describes the physical state of the pages, indicating they have stains.
이 책은 오래되었고 얼룩진 페이지들이 있습니다.
This book is old and has stained pages.
In this context, "얼룩진" is used metaphorically to describe memories that have been affected or clouded over time.
그의 기억은 시간의 경과로 얼룩진 상태가 되었다.
His memories have become tarnished over time.
Here, "얼룩진" literally refers to the shirt being stained by coffee, denoting visible physical stains.