The compound word **盘旋** is formed through the combination of two semantically related characters: **盘** (pán), which originally meant a coiled or winding shape (like a plate or a winding path), and **旋** (xuán), which means to revolve, spin, or circle. Together, they create a synergistic meaning that describes a continuous, circular, or spiral motion, such as an airplane circling in the sky, a road winding up a mountain, or even abstractly, for thoughts or conversations that go around a topic without resolution. The formation is a typical example of a coordinative compound in Chinese, where both components contribute equally to the overall metaphorical sense of encircling or revolving movement.