The kanji 尾 primarily means "tail." It represents the tail of an animal, which is the appendage extending from the rear end of its body. This core meaning extends to things that resemble a tail in shape or function, such as the end or rear of something.

・On-yomi (音読み): bi (ビ) ・Kun-yomi (訓読み): 尾 (o)

⚫︎ 尾 (o): tail (kun-yomi, used alone) ⚫︎ 尾行 (bikou): following (someone) / tailing Translation: Following ⚫︎ 尾根 (one): ridge (of a mountain) Translation: Ridge

The kanji 尾 is a pictograph. It depicts the tail of an animal, specifically resembling a tail swishing back and forth. The character's shape directly mirrors the physical appearance of this appendage, which evolved through ancient writing styles.