This is the 910th most frequent Korean word.
언급한
"Mentioned"
Here, '언급한' (eong-geub-han) is an adjective modifying 'content (내용)' to indicate it has been mentioned earlier.
언급한 내용은 매우 중요합니다.
The mentioned content is very important.
'언급한' here refers to 'what was mentioned,' used as a modifier for the noun 'thing' implicitly stated.
그가 언급한 것을 다시 검토해 봅시다.
Let's review what he mentioned again.
In this context, '언급한' is part of an adjectival phrase modifying the subject, referring back to prior statements.