The word "涞源" is formed by combining two characters: "涞", which uses the water radical (氵) with "来" as a phonetic component, specifically referring to the Lai River, and "源", which also uses the water radical (氵) with "原" indicating meaning and sound, denoting "source". Together, they semantically represent "source of the Lai River" as a place name, with each character's water radical reinforcing the association with water.