減点

1. Origins, structure, and basic meaning

• Structure: 減点（げんてん） means deducting points from a score.
• Basic usage: Use it for losing points because of an omission in an answer or a foul in a game.

2. Common pitfalls and similar expressions

• Deducting versus adding points
  • 減点する means deducting points.
  • 加点する means adding points.