圆舞曲

• 囗(encircling ring; surrounding loop)RADICAL
• 员(member)PHONETIC

A circle is a shape that is completely enclosed and closed like a member held within embracing arms.

• 無(empty; void)ASSOCIATIVE
• 舛(two feet pointing in opposite directions)RADICAL

Dancing is when two feet move in opposite directions as if there is no longer gravity.

• 曰(mouth open; speak)RADICAL
• 丨丨(two vertical strokes indicating a curve)ASSOCIATIVE

The character 曲 shows a vessel's mouth with two curved walls, evoking the image of a bent and winding elbow.