

段ボールを紐でしっかり結びました。
紐を使って、きれいな円を描きました。
長い紐はありませんか。
"ひも(紐)" is in the lesson "Geometric figures" (Level 45), along with 11 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.