This is the 1820th most frequent Japanese word.
帽子
Hat.
In this sentence, '帽子' (boushi) is used as a noun meaning 'hat' to represent an object one can buy.
私は新しい帽子を買いました。
I bought a new hat.
Here, '帽子' is used to refer to a particular hat as the subject of a compliment.
この帽子はあなたにとても似合っていますね。
This hat suits you very well.
In this case, '帽子' is included in a request, emphasizing the action of putting on a hat.