The word "烦躁" is formed by combining the characters "烦" and "躁". "烦" means annoyed, incorporating the radical "火" (fire) to suggest heat-like agitation, with "页" primarily serving as a phonetic element. "躁" means restless, using the radical "足" (foot) to imply physical fidgeting, with "喿" as a phonetic component. Together, they denote a state of irritability and agitation, blending mental and physical unease.