verb (used without object), spec·u·lat·ed, spec·u·lat·ing.
to engage in thought or reflection; meditate (often followed by on, upon, or a clause).
to indulge in conjectural thought.
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 of speculate
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
Synonyms for speculate
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
(when tr, takes a clause as object) to conjecture without knowing the complete facts
(intr) to buy or sell securities, property, etc, in the hope of deriving capital gains
(intr) to risk loss for the possibility of considerable gain
(intr) NZ rugby to make an emergency forward kick of the ball without taking any particular aim
Word Origin for speculate
C16: from Latin speculārī to spy out, from specula a watchtower, from specere to look at
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
1590s, back-formation from speculation. Related: Speculated; speculating.
Online Etymology Dictionary, © 2010 Douglas Harper