The word "瑕疵" is formed by combining two characters: "瑕" consists of the radical "王" (jade) and the phonetic component "叚", originally indicating a flaw in jade, while "疵" consists of the radical "疒" (sickness) and the phonetic component "此", originally denoting a blemish or defect. Together, they form a compound where both characters semantically contribute to the meaning of a flaw or imperfection.