早起き

1. Origins, structure, and basic meaning

• Structure: 早起き (はやおき) means getting up earlier than usual. The examples use a verb and a noun denoting habit.
• Basic usage: Someone rises early on a travel day; daily early rising gradually becomes habitual.

2. Common pitfalls and similar expressions

• Early rising on one occasion and repeated habit
  • 早起きした is one completed act; 毎日の早起き is a recurring practice. The usual schedule, not an absolute clock time, provides the baseline.