theorize

Verb

• form or construct theories
  • he thinks and theorizes all day
    

• construct a theory about
  • Galileo theorized the motion of the stars
    

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

Related words

• Synonyms: 
  speculate , theorise , conjecture , hypothesize , hypothesise , hypothecate , suppose