every

1. Origins, structure, and basic meaning

• Structure: 毎 has 6 strokes and denotes repetition at each occurrence of a unit.
• Basic usage: 毎日 is read まいにち, and 毎年 is read まいとし.

2. Common pitfalls and similar expressions

• The unit of repetition
  • 毎日三十分歩いている means walking for thirty minutes every day.
  • 毎年同じ山に登ります means climbing the same mountain every year.
• Frequency and duration
  • 毎日 expresses frequency, while 三十分 in the first example specifies the time spent walking each day.