斜線

1. Origins, structure, and basic meaning

• Structure: It is read しゃせん. 斜 contributes slanting and 線 a line, forming a word for a line inclined relative to a horizontal or vertical direction.
• Basic usage: It is used for a slanted mark on a document or for something resembling such a line, including a beam of light. The example asks for a red diagonal mark at the part needing correction.
  • 訂正する箇所に赤い斜線を引いてください。

2. Common pitfalls and similar expressions

• The mark and its context
  • 斜線を引く describes the shape of a mark and the act of drawing it; the surrounding context supplies its purpose. The example marks a part needing correction, but the word for a diagonal line does not always imply deletion.