The word "眩晕" is formed by combining the characters "眩" and "晕". "眩" uses the radical "目" (eye) to indicate visual disturbance, with "玄" providing phonetic approximation, meaning dizziness or dazzle. "晕" uses the radical "日" (sun) to suggest light-headedness or halo effects, with "军" as a phonetic component, meaning faintness or spinning. Together, they create a compound term where both characters reinforce the concept of vertigo, encompassing visual and physical dizziness.