How to Say "to deem" in Spanish
The Spanish word for “to deem” is “considerar” — B2 level. This is a very common word in everyday Spanish.

Examples
Mucha gente considera a ese científico un genio.
Many people regard that scientist as a genius.
Considero tu decisión un error grave.
I deem your decision a serious mistake.
Consideraron el proyecto terminado la semana pasada.
They considered the project finished last week.
Using 'Considerar' + Adjective
When you use 'considerar' to describe what you think of something, the descriptive word (adjective) must match the gender and number of the thing being described: 'La película es considerada buena' (The movie is considered good).
Using 'Como' (As)
Mistake: “Mucha gente considera como a ese científico un genio.”
Correction: Mucha gente considera a ese científico un genio. (In Spanish, 'considerar' often doesn't need 'como' when linking the thing and the classification, though it is sometimes used for emphasis.)
Related Translations
Learn Spanish with Inklingo
Interactive stories, personalized learning, and more.