The word 路过 is formed by directly combining two pictographic characters to create a new, unified concept. The first character, 路, depicts a "road" or "path". The second, 过, originally depicted a foot stepping over a boundary, meaning "to pass" or "to cross". By placing them side-by-side, the formation visually and conceptually represents the action of passing by or through a road, effectively capturing the momentary act of traversing a place without stopping.