verb (used without object), the·o·rized, the·o·riz·ing.
verb (used with object), the·o·rized, the·o·riz·ing.
Examples from the Web for theorise
But personally I have never found it among those who make religion as distinguished from those who theorise upon it.The Hearts of Men|H. Fielding
My desire for the moment, however, is not to theorise, but to let facts speak in reply to accusation.Fragments of science, V. 1-2|John Tyndall
The sociologist may theorise, but plain people will remember that men do not gather grapes from thorns, nor figs from thistles.James Watt|Andrew Carnegie
Of course I can theorise it now perfectly, and practise it at periods.The Hive|Will Levington Comfort
The day when Wagner began, not to theorise, but to publish his theorisings, was an unlucky one for him.Richard Wagner|John F. Runciman