speculate

[1]	theorize , speculate on/upon/about/over , reflect (on/about/over) , theorise , conjecture , consider , muse (on/about/over) , hypothesize , hypothesise , meditate (on/over/about) , contemplate (on/about) , hypothecate , cogitate (on/about) , suppose , think (about/over/on) , ponder (over/about) , mull over , chew on/over , ruminate (on/over/about) , wonder (about) , deliberate (over/on/about) , weigh , judge , evaluate , theorize (on/about) , conjecture (on/about) , postulate , hypothesize
[2]	gamble , wager , take a chance , (Colloq) have a flutter , play the market , take a plunge
[3]	chew over , think over , meditate , ponder , excogitate , contemplate , muse , reflect , mull , mull over , ruminate
[4]	job