The word 眼睫毛 is formed by combining three characters: 眼, meaning "eye"; 睫, meaning "eyelash"; and 毛, meaning "hair". Together, they create a compound noun where 眼 specifies the location, 睫 denotes the specific feature, and 毛 clarifies the type of structure, resulting in a term that directly refers to the hairs on the eyelid, i.e., eyelashes.