A whirl, swirl, or vortex in water or air (e.g., a whirlpool); also used metaphorically for chaotic or swirling situations.
川の流れに大きな渦ができていた。
A large whirl had formed in the river's current.
コップの中のコーヒーに小さな渦ができた。
A small swirl appeared in the coffee in the cup.
不正疑惑の渦に巻き込まれて会社の評判が下がった。
The company’s reputation fell after being caught up in a swirl of scandal.