The word "珐琅" is formed through phonetic borrowing, where the characters "珐" (fà) and "琅" (láng) are combined solely to approximate the sound of the foreign term for enamel, likely derived from sources such as Persian "فیروزه" (fīrūza) or Arabic "فِلِزَّا" (filiṯṯā), without conveying inherent meaning from the individual characters in this context.