spec·u·late

[spek-yuh-leyt]
verb (used without object), spec·u·lat·ed, spec·u·lat·ing.
1.
to engage in thought or reflection; meditate (often followed by on, upon, or a clause).
2.
to indulge in conjectural thought.
3.
to engage in any business transaction involving considerable risk or the chance of large gains, especially to buy and sell commodities, stocks, etc., in the expectation of a quick or very large profit.

Origin:
1590–1600; < Latin speculātus, past participle of speculārī to watch over, explore, reconnoiter, derivative of specula watch tower, noun derivative of specere to look, regard; see -ate1

o·ver·spec·u·late, verb (used without object), o·ver·spec·u·lat·ed, o·ver·spec·u·lat·ing.
pre·spec·u·late, verb (used without object), pre·spec·u·lat·ed, pre·spec·u·lat·ing.
un·spec·u·lat·ing, adjective


1. think, reflect, cogitate. 2. conjecture, guess, surmise, suppose, theorize.
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Based on the Random House Dictionary, © Random House, Inc. 2013.
Cite This Source Link To speculate
00:10
Speculate is always a great word to know.
So is interrobang. Does it mean:
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
Collins
World English Dictionary
speculate (ˈspɛkjʊˌleɪt) [Click for IPA pronunciation guide]
 
vb
1.  (when tr, takes a clause as object) to conjecture without knowing the complete facts
2.  (intr) to buy or sell securities, property, etc, in the hope of deriving capital gains
3.  (intr) to risk loss for the possibility of considerable gain
4.  (NZ) (intr) rugby to make an emergency forward kick of the ball without taking any particular aim
 
[C16: from Latin speculārī to spy out, from specula a watchtower, from specere to look at]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

speculate
1590s, a back formation from speculation.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
After the de-fleshing process, the corpses had been neatly laid to rest on wide
  wooden shelves, the researchers speculate.
The scientists speculate that this behavior may allow the animals to stay
  spatially oriented.
Others speculate it is a secret facility designed to house extraterrestrial
  visitors.
It's interesting that you still speculate about other planets.
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