The Chinese word "门锁" is formed through the direct combination of two pictographic and conceptual characters: "门", which depicts a door with its swinging panels, and "锁", which represents a lock with its securing mechanism. By placing "门" before "锁", the concept of a door is applied to specify the type of lock, creating a compound that visually and semantically merges the idea of a door with that of a lock to denote the specific object, a door lock. This formation relies on the inherent meanings of the characters being joined to produce a new, unified term for a common everyday item.