The Chinese word **鼻孔 (bíkǒng)**, meaning "nostril," is a straightforward compound formed by combining two independent characters: **鼻 (bí)**, which means "nose," and **孔 (kǒng)**, which means "hole" or "opening." This structure follows the common Chinese word-formation method of **modifier-head composition**, where the first character specifies the category or location (nose), and the second character denotes the specific feature or object (hole). Thus, the term literally and logically translates to "nose hole," creating a clear and intuitive meaning for the anatomical feature.