speculate

Verb

• 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
    

• 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
    

• 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
    

• to believe especially on uncertain or tentative grounds
  • Scientists supposed that large dinosaurs lived in swamps
    

Related words

• Synonyms: 
  job , theorize , theorise , conjecture , hypothesize , hypothesise , hypothecate , suppose