This is the 650th most frequent Chinese word.
普通
"Ordinary" or "common."
Here, '普通' is used as an adjective to describe '学生' (student) as being ordinary or normal.
他是一个普通的学生。
He is an ordinary student.
In this sentence, '普通' is used to characterize the taste of the food as being unremarkable or average.
这家餐厅的菜味道很普通。
The food at this restaurant tastes very ordinary.
Here, '普通' modifies '人' (people), indicating common or regular persons in society.