speculation

意味

• n. 推測
• n. 投機

英語の定義

• n. a hypothesis that has been formed by speculating or conjecturing (usually with little hard evidence)
• n. an investment that is very risky but could yield great profits

語形変化

複数形

speculations

例文

1. n. 推測

   There was much speculation about who would become the company's new CEO.

   誰が会社の新しいCEOになるのかについて、多くの推測がなされていました。

2. n. 投機

   He lost a lot of money through risky stock market speculation.

   彼は危険な株式投資（投機）によって多額の資金を失いました。