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tail (of an animal); cauda
tail (of a kite, etc.); tail end
tail (of a comet)
slope at the foot of a mountain
「尾」 has another reading with different meanings.
犬が尻尾を振っていて可愛いね。
The dog wagging its tail is cute.
猫の尾は長くてふわふわしている。
The cat's tail is long and fluffy.
魚の尾を持って持ち上げたんだ。
I lifted it by holding the fish's tail.