Rope
Sumo Champion's Belt
independent noun
The kanji is cable but this word refers to more of a rope, which is pretty similar. This can also mean a sumo champion's belt, though you'll probably see that meaning a lot less, unless you're a huge sumo fan.
つな
The reading used here is the reading you learned with the kanji.
ロッククライミング中に落ちないように綱で体を固定しました。
I used a rope to hold myself in place so I wouldn't fall while rock climbing.
新しい横綱のための綱が出来上がった。
The sumo belt for a new sumo champion was completed.
二つの気球の間を綱渡りした男の人の話はもうお聞きになりましたか？
Have you heard of the guy who walked a tightrope between two hot air balloons?