This is the 11439th most frequent Korean word.
껍질과
"껍질과" means "peels and skins" in English.
The word "껍질과" here is used to join "껍질" (peel) and "속" (flesh), denoting both are consumed.
사과 껍질과 속을 모두 먹었어요.
I ate both the apple's peel and its flesh.
In this sentence, "껍질과" connects "껍질" (peel) and "씨앗" (seeds), explaining the items omitted from cooking.
껍질과 씨앗은 요리에 사용되지 않았어요.
The peel and seeds were not used in cooking.
Here, "껍질과" associates "껍질" (peel) with "관련된" (related), describing the special aroma.