

犬がうれしそうにしっぽをふっています。
このねこのしっぽは長いですね。
うさぎには長いしっぽがありません。
"しっぽ(尻尾)" is in the lesson "Small animals" (Level 6), along with 15 other useful words. LinDuo has 180 topic lessons like this one, 2,379 words in total. Every word has an illustration, a transcription and pronunciation in a female and a male voice. Just 10–15 minutes a day is enough to learn them all. Free, and works offline.