渦巻き

1. Origins, structure, and basic meaning

• Structure: 渦巻き(うずまき) is a noun for a swirling vortex or its spiral shape.
• Basic usage: It covers both a pattern on a plate and an actual whirlpool in a river.

2. Common pitfalls and similar expressions

• Noun and verb
  • 渦巻き names the swirl or shape; 渦巻く(うずまく) describes swirling movement.