This is the 17824th most frequent Korean word.
속은
"속은" means "inside" or "interior" in English.
In this sentence, '속은' refers to 'mind' or 'inner feelings', indicating warmth and sincere emotion.
그녀의 속은 정말 따뜻하다.
Her mind is truly warm.
Here, '속은' means 'inside' or 'interior', pointing to the physical emptiness of something.
그 책의 핵심은 속은 비어 있다는 사실이었다.
The core of the book is the fact that the inside is empty.
In this example, '속은' again represents 'inside' or 'inner state', possibly referring to the inner development or outcome.