/'spekjʊleɪt; `spɛkjə,let/
v
1 [I, Ipr, Tf] ~ (about/on/upon sth) form opinions without having definite or complete knowledge or evidence; guess 思考; 思索; 推断; 推测
*speculate about/upon the future 对未来的推想
* I wouldn't like to speculate on the reasons for her resignation. 我不愿意猜测她辞职的原因.
* I can only speculate that he left willingly. 我看他一定是自愿走的.
2 [I, Ipr] ~ (in sth) buy and sell goods or stocks and shares in the hope of making a profit through changes in their value, but with the risk of losing money 投机; 做投机买卖
*speculate in oil shares 做石油股票的投机买卖
* speculating on the stock market 进行证券投机.

v
[Date: 1500-1600; Language: Latin;Origin: , past participle of speculari 'to watch (secretly)', from specere 'to look (at)']
[I and T]
to guess about the possible causes or effects of something, without knowing all the facts or details
　She refused to speculate.
speculate on/about (why/what etc)
　Jones refused to speculate about what might happen.
speculate that
　Some analysts speculated that jobs will be lost.
[I]
to buy goods, property, shares in a company etc, hoping that you will make a large profit when you sell them
speculate in/on
　He speculated in stocks.