Theorized is a verb meaning to say that something is probably true. You might theorize about what might have happened in the past, or what might happen in the future.
The police theorized that the suspect was involved in the crime.
The scientist theorized that the new vaccine is safe.
verb
To formulate a theory, especially about some specific subject.
verb
To speculate.
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He theorized a circulation of the blood.
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No salutary purpose is served by further theorizing and indecision.
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Observers theorize that Americans are spending a lot of money.
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It is theorized that the city was submerged at the end of the last ice age.
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Let the philosophers theorize about the subliminal hierarchael message.
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Or are you the first person to theorize that Greeks influenced the Chinese
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It is theorized to have a mass 500 trillion times the mass of the Sun.
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He was the first to theorize infinite suns and infinite worlds in the universe.
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Experts theorize that heavy news coverage of such attacks increases the notoriety of the attackers.
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I want to theorize on whether or not she has a genuinely decent relationship with her husband.