Thoughts swirled.

Meaning: This sentence means that someone's thoughts were moving around in their head in a disorganized or confused way.

Choice of Words: Thoughts refers to the ideas or images that form in a person's mind. Swirled means to move in a circular or spiraling motion. In this context, 'Thoughts swirled' means that someone's thoughts were moving around in their head in a disorganized or confused way.