pavilion

閣 is composed of 門 (door) and 各 (each). Since 門 represents a structure or doorway and 各 signifies a distinct, self-contained unit, 閣 combines these components to express an independent, standalone building. Structures of this type are typically elevated, offering wide, high views, and are commonly used for sightseeing or storing books—thus giving rise to its meaning of a pavilion, tower, or library loft.