Origin

The character 曜 combines a sun or day symbol on the left with a sound component on the right. The left part, 日, represents the sun or a day, which makes sense since weekdays are counted by the passage of days. The right part, 翟, is primarily a sound hint that tells you roughly how to pronounce the character in Chinese and Japanese, rather than adding meaning of its own. Together, the character came to mean "weekday" or "day of the week" because it pairs the concept of a day with a particular sound value.

AI-generated (claude-haiku-4-5), not yet reviewed. Formation type (automated guess): Phono-semantic (meaning + sound hint).