tail　名詞　【IE.*dek- (ふさ, 髪の毛の房) →*doklo →Gmc.*taglaz →OE.tæg(e)l (尾) → 】

尾
　　The dog was running in circles trying to catch its tail.　 犬は自分のしっぽを捕らえようとぐるぐる回っていた。

put one’s tail between one’s legs　しっぽを巻く
　　When she said, “No, you have had enough,” her dog put his tail between his legs and walked off to the corner of the room.　「だめよ、もう 充分食べたでしょ」と彼女が言うと、犬はしっぽを巻いて部屋の隅にひきさがった。

with one’s tail between one’s legs　しっぽを巻いて
　　While the losing team was leaving the ground with their tails between their legs, the fans of the winning team were singing their rooter’s song until they were tired.　負けたチームがしょげかえってグラウンドを後にする中で、勝ちチームのファンたちは 応援歌を飽きるまで歌っていた。

後部
　　The monitoring device is fixed at the tail of a car to shoot images behind the car.　そのモニター装置は車の後部に 取り付けられ、背後の映像を撮る。

コインの裏面
　　On the tail of the coin there was an eagle similar to that on the Great Seal of the United States.　コインの裏側 には合衆国印章にあるのと同じようなワシが彫られていた。
　　He threw the coin up and I called out, “tails”.　彼がコインを上に投げ、私が「裏」と言った。

尾行
　　She had made up her mind to put a tail on her husband to find out the truth.　彼女は真実を知るために、夫に尾行を つけることにした。