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speculate about (someone or something)

To conjecture, hypothesize, or make guesses about someone or something without having supporting or conclusive evidence. We've all been speculating about the mysterious man who moved into the house two doors down. It's certain to be a gamble, but until we try it, all we can do is speculate about how the product will do on the market.
See also: speculate

speculate in (something)

To buy or sell some asset, such as commodities, securities, property, etc., at a risk while hoping to gain a profit from short-term market fluctuations. My uncle made, then promptly lost, a fortune speculating in oil wells in the 1980s. You'd be a fool to speculate in dairy in today's market.
See also: speculate

speculate on (something)

To conjecture, hypothesize, or make guesses about something without having supporting or conclusive evidence. You can't just speculate on what effect this legislation will have on the country—you've got to have some concrete data to show it will work! Instead of spending your energy speculating on the future, you should focus on the present and do what makes you happy.
See also: on, speculate
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

speculate about someone or something

to make guesses about someone or something; to hypothesize about someone or something. I refuse to speculate about Sally. I don't presume to guess what she will do. We don't speculate about the future.
See also: speculate

speculate in something

to make risky business deals in the buying and selling of something. Jeff made a fortune speculating in cotton. I do not wish to speculate in anything. It is too risky.
See also: speculate

speculate on something

to make a hypothesis about something. I really don't want to speculate on what might happen next. Would you care to speculate on what might happen if you quit your job?
See also: on, speculate
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
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References in periodicals archive ?
Contrary to rumours, incumbent Premier D M Jayarathne is likely to continue, while it is speculated that Sri Lanka's youngest-ever MP, Namal Rajapaksa will be appointed Minister of President's Office and J.
Although the deal size was not revealed, it is speculated to be between USD10m (EUR7.2m) and USD20m, a source told TechCrunch.
Paleontologists had speculated that such agile prey made up plesiosaurs' main diet and that the dinosaurs used their long necks to reach victims without moving too near them, says Colin R.
Washington, July 29 ( ANI ): The latest to do the rounds of rumours surrounding Apple's newest flagship product iPhone5S is its launch date, which is speculated to be September 6.
Thompson and others had speculated that debris thrown up during an impact that left behind a large crater named Shoemaker settled back into and filled many of Eros' other craters (SN: 10/27//01, p.
Previously, scientists had speculated that the inner zone of a plume consists of molten rock from the lowermost mantle and that the outer layers include material dragged along from higher mantle regions as the plume ascended.
We speculated that transfer of DNA between hosts and parasites was a two-way street, but they actually documented that fact."
Before the experiments, he speculated that, by preventing programmed cell death and encouraging inflammation, IKK-beta also promotes the emergence and growth of tumors.
Zitvogel's team has speculated that the tumor makes exosomes to somehow blind the immune system to the growth of the cancer cells.
Increased cytokines may reflect pervasive inflammatory action, the researchers speculated last June in San Francisco at the annual meeting of the Endocrine Society.
They speculated that Tsix might also control the random X inactivation of women.
Because the wasps, Polistes fuscatus, maintain a pecking order, observers have long speculated that colony members can tell who's who.