尾

1. Origins, structure, and basic meaning

• Structure: 尾 is read お. It means an animal's tail and can also mean the rear end of something extended in a line.
• Basic usage: It refers to a fish's physical tail and the rear of a long procession.

2. Common pitfalls and similar expressions

• An animal's tail
  • 魚が尾を振って describes a fish physically swishing its tail.
• Rear of a procession
  • 長い行列の尾 refers to the final part of a long procession.