This is the 9843rd most frequent Korean word.
골수
"골수" means "bone marrow" in English.
Metaphorical use to describe an extreme sensation.
그는 골수까지 춥다고 느꼈다.
He felt cold to the bone.
Medical context referring to bone marrow.
골수 기증이 필요한 환자가 많습니다.
There are many patients in need of a bone marrow donation.
Derived use referring to a color inspired by the marrow's appearance.