String
Bowstring
noun
The kanji and the word share meanings — in this case, the musical string and bowstring meanings!
The reading can be either the kun'yomi or on'yomi reading, so you have a choice. Since you learned the on'yomi げん with the kanji already, let's learn the つる reading here.
When people see your mysterious bow, their curiosity takes over. Without even asking, they walk right up and start pulling the bowstring. Too rude (つる)! Seriously, some people have no manners. Who just yanks on someone's bowstring like that?! TOO RUDE!
Keep in mind that the on'yomi reading げん refers to the strings of a stringed instrument, whereas the kun'yomi つる refers to the string of a bow.
ギターの弦が緩んでいます。
The guitar strings are loose.