(พบน้อย)
1. คนที่มีความสามารถ หรือ ฉลาดปราดเปรื่องอย่างยิ่ง : The chairman of this firm is truly a diamond of the first water. You can't imagine how much money he can earn each month.

The following video provides you with the correct English pronunciation of the word "a diamond of the first water", to help you become a better English speaker.