"theorize" in the verb sense
1. speculate, theorize, theorise, conjecture, hypothesize, hypothesise, hypothecate, suppose
to believe especially on uncertain or tentative grounds
"Scientists supposed that large dinosaurs lived in swamps"
2. theorize
construct a theory about
"Galileo theorized the motion of the stars"
3. theorize
form or construct theories
"he thinks and theorizes all day"
Source: WordNet® (An amazing lexical database of English)
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