The word "萦绕" is formed by combining two characters that both convey the idea of winding or encircling. "萦" incorporates the grass radical (艹) suggesting entanglement, along with a phonetic component, while "绕" uses the silk radical (纟) indicating thread-like continuity, paired with the phonetic "尧". Together, they create a compound where each character reinforces the concept of something coiling or lingering, such as thoughts or sounds.