1.
day
A 24-hour period.
My physical condition varies from day to day, so I try not to push myself.
2.
sun, sunlight
Light from the sun.
日 means day and sun—one of the most common kanji with multiple readings.
READINGS:
- ひ: day, sun (日が出る)
- にち: counter for days, dates (三日)
- じつ/にっ: in compounds (日本, 日光)
- か: in date counters (二日, 三日)
SENSE 1 - DAY:
- いい日: a nice day
- 特別な日: a special day
- 雨の日: rainy day
SENSE 2 - SUN:
- 日が昇る: the sun rises
- 日が沈む: the sun sets
- 日に当たる: to be in the sun
COMMON COMPOUNDS:
- 今日: today
- 毎日: every day
- 日本: Japan
- 日曜日: Sunday