the·o·rize also Brit the·o·rise 
/ˈθi:jəˌraɪz/ verb
the·o·riz·es; the·o·rized; the·o·riz·ing /ˈθi:jəˌraɪz/ verb : to think of or suggest ideas about what is possibly true or real : to form or suggest a theory about something [no obj] ▪ Many scientists have theorized about/on the possibility of life on other planets. [+ obj] — usually + that ▪ The police theorized that the same person was responsible for both murders.
