傍線

1. Origins, structure, and basic meaning

• Structure: 傍線 (ぼうせん) is a noun for a line drawn beside or beneath text to mark a particular passage.
• Basic usage: 文の下に傍線を引く makes the mark drawn by a reader the object, while 傍線の部分を手掛かりにする uses an already marked passage as an interpretive clue.

2. Common pitfalls and similar expressions

• Drawing the line and marked passage
  • 傍線を引く creates a mark, whereas 傍線の部分 denotes the text indicated by it. The line itself should not be equated with the sentence content.