難易度

1. Origins, structure, and basic meaning

• Structure: Spelling: 難易度. Reading: なんいど. Core meaning: difficulty level.
• Basic usage: Representative examples: 練習問題を難易度の低い順に並べた / 参加者の経験に合わせて課題の難易度を調整した.

2. Common pitfalls and similar expressions

• A scale of difficulty
  • 難易度 places ease and difficulty on a scale. It focuses on a level that can be ordered or adjusted, rather than merely saying that something is difficult.