speculate (v.)

• belong
• brood
• bucket
• call
• cerebrate
• cogitate
• consider
• contemplate
• debate
• deliberate
• digest
• divine
• dope
• evaluate
• excogitate
• financier
• forebode
• forecast
• foresee
• foretell
• gamble
• game
• guess
• hypothesize
• introspect
• invest
• judge
• lot
• meditate
• muse
• operate
• place
• play
• plunge
• ponder
• postulate
• predict
• prefigure
• presage
• prognosticate
• prophesy
• put
• pyramid
• reason
• reflect
• review
• risk
• ruminate
• scalp
• sink
• sport
• stag
• study
• theorize
• toss
• vaticinate
• venture
• wager
• weigh