speculate
     v 1: to believe especially on uncertain or tentative grounds;
          "Scientists supposed that large dinosaurs lived in
          swamps" [syn: {theorize}, {theorise}, {conjecture}, {hypothesize},
           {hypothesise}, {hypothecate}, {suppose}]
     2: talk over conjecturally, or review in an idle or casual way
        and with an element of doubt or without sufficient reason
        to reach a conclusion; "We were speculating whether the
        President had to resign after the scandal"
     3: reflect deeply on a subject; "I mulled over the events of
        the afternoon"; "philosophers have speculated on the
        question of God for thousands of years"; "The scientist
        must stop to observe and start to excogitate" [syn: {chew
        over}, {think over}, {meditate}, {ponder}, {excogitate}, {contemplate},
         {muse}, {reflect}, {mull}, {mull over}, {ruminate}]
     4: invest at a risk; "I bought this house not because I want to
        live in it but to sell it later at a good price, so I am
        speculating" [syn: {job}]
Source: WordNet® 2.0