ruler
🇺🇸
/ˈruːlər/
🇬🇧
/ˈruːlə(r)/
A person who leads or controls a country or group.
The ruler made new laws for the people.
统治者为人民制定了新法律。
A tool used for measuring or drawing straight lines.
Use a ruler to draw a straight line.
使用直尺画一条直线。