This is the 5637th most frequent Korean word.
반가운
Pleasant; welcome; glad to see.
반가운 here is used as an adjective to describe '얼굴' (face), indicating pleasure or gladness upon meeting a person.
오랜만에 반가운 얼굴을 봤어요.
I saw a pleasant and familiar face after a long time.
반가운 is used here as an adjective modifying '소식' (news), expressing positive emotions triggered by the news.
친구에게서 반가운 소식을 들었어요.
I heard delightful news from a friend.
반가운 is used to characterize '기분' (feeling), signifying a fond or glad emotional reaction associated with memories of the past.