The word **脸孔** (liǎnkǒng) is a **synonym compound** formed by combining two characters with closely related meanings: **脸** (liǎn), which means "face," and **孔** (kǒng), which literally means "hole" or "opening" but in this context is an archaic or literary term for the facial features (i.e., the eyes, nostrils, and mouth). Together, they create a single, more formal or literary noun meaning "face" or "countenance," where **孔** subtly emphasizes the features or apertures of the face, thereby enriching the term beyond the basic meaning of 脸 alone.