슬프다 is a word that is often used within K-pop songs. I think it shows its pretty head MOSTLY in ballads, because the theme seems to be a bit more sad (break-ups, loneliness, all that jazz...). Definitely a useful word to know! Let's look at some examples!
K-pop song sample sentences:
"이건 나의 슬픈 이야기?" (Story - Shayne (Flower Boy Ramen Shop OST)) This is my sad story.
"가끔 슬퍼져도 추억에 웃자." (Let's break up - Lee Seung Gi) Even if we become sad sometimes, let's smile at the memories.
"잘지내란 말이 슬퍼서" (Tears are Falling - Wax (I miss you OST)) The words "Be Well" were sad, so...
"오늘따라 이 멜로디가 슬프네요." (Love Box - Seungri) Today of all days, this melody is sad.
"어떤 슬픔도 어떤 아픔도?" (Heaven - Ailee) No matter what sadness (sorrows), no matter what pain...
OTHER sample sentences:
"왜 그렇게 슬퍼 보이니?" Why do you look so sad?
"이것은 슬퍼, 슬픈 날이야." Today is a sad, sad day.