遅い

1. Origins, structure, and basic meaning

• Structure: 遅い, read おそい, can mean late in time or slow in speed.
• Basic usage: It can describe a late return home or a machine moving slowly.

2. Common pitfalls and similar expressions

• Late and slow
  • In the examples, 時間が遅い refers to a late time.
  • 動きが少し遅い refers to slightly slow movement.
• Writing the opposites
  • Use 早い for early in time.
  • Use 速い for fast in speed.
  • Both are read はやい.