The word 纸巾 is formed by directly combining two characters, each contributing a clear, concrete meaning to create a new, specific concept. The first character, 纸 (zhǐ), means "paper". The second character, 巾 (jīn), means "cloth" or "towel". When placed together, they form a literal and descriptive compound: a "paper cloth", which intuitively and visually represents the object we know as a tissue, paper towel, or napkin. It is a straightforward, logical fusion where the material (paper) defines the form and function of the item (a cloth-like sheet).