弦

1. Origins, structure, and basic meaning

• Structure: 弦(げん) means a string stretched on a musical instrument to produce sound.
• Basic usage: It is used when a guitar string breaks or is replaced with a new one.

2. Common pitfalls and similar expressions

• Breaking and cutting
  • 弦が切れた describes a string breaking.
  • 弦を切った describes someone cutting a string.
• Thread and an instrument string
  • 糸(いと) broadly refers to thread; 弦 focuses on a string's role in producing an instrument's sound.