wagerer

The wagerer handed his ticket to the clerk and waited nervously for the result.

用法提示：wagerer是名词，指打赌或下注的人，句中作主语。

Experienced wagerers usually study the statistics before placing a bet.

用法提示：wagerers为wagerer的复数形式，此处泛指下注者群体。

As a careful wagerer, she only risks money she can afford to lose.

用法提示：wagerer作表语，说明主语的身份是下注者。