내용 means content, details.
It refers to the substance or information within something, such as a book, conversation, or situationThe content, the details
Example Sentences:
이 책의 내용이 아주 흥미로워요. (i chaek-ui nae-yong-i a-ju heung-mi-ro-wo-yo.) – The content of this book is very interesting.
회의 내용은 비밀이에요. (hoe-ui nae-yong-eun bi-mil-i-e-yo.) – The details of the meeting are confidential.
메일 내용이 이해하기 어려워요. (me-il nae-yong-i i-hae-ha-gi eo-ryeo-wo-yo.) – The email’s content is difficult to understand.
The polite form 내용이 (nae-yong-i) is used when referring to “content” in a sentence.