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How to Say "genius" in Spanish

English → Spanish

bestia

/BES-tyah//ˈbes.tja/

nounC1informal
Use 'bestia' informally to describe someone who is incredibly skilled or talented in a particular area, emphasizing their raw, almost overwhelming ability.
A focused character expertly balancing a very tall, colorful stack of wooden blocks on one fingertip, illustrating great skill.

Examples

Ese guitarrista es una bestia, toca increíblemente rápido.

That guitarist is a monster/genius, he plays incredibly fast.

Ganó el campeonato de ajedrez otra vez, es una bestia de la estrategia.

He won the chess championship again, he is a strategic genius.

monstruo

MOHN-stroh/'monstɾwo/

nounB2informal
Employ 'monstruo' informally to highlight someone's prodigious skill or talent, suggesting they are almost unbelievably good at what they do.
A young, intensely focused musician expertly playing a complex piece on a violin on a simple stage, illustrating prodigious skill.

Examples

No puedo creer lo que toca; es un monstruo del piano.

I can't believe what he plays; he is a genius on the piano.

Su jefe es un monstruo que obliga a sus empleados a trabajar 70 horas a la semana.

His boss is a brute who forces his employees to work 70 hours a week.

Nuestra defensa fue un monstruo en el partido de hoy.

Our defense was monstrously good in today's game. (meaning: incredibly strong)

Using 'de'

When praising someone's skill, 'monstruo' is often followed by 'de' plus the activity: 'monstruo del ajedrez' (chess whiz).

Positive/Negative Context

Mistake: “Applying this meaning without clear context, confusing the listener whether you mean 'incredibly talented' or 'incredibly cruel.'”

Correction: Always pair it with a description of their action or field ('monstruo de la música,' 'monstruo de la avaricia') to clarify if you mean good or bad.

demonio

deh-MOH-nee-oh/deˈmonjo/

nounB2informal
Use 'demonio' cautiously, as it's less common for 'genius'; it can imply exceptional brilliance but is more often used for someone very energetic or mischievous, even a child.
A storybook illustration showing a young child with a wide, mischievous smile and bright eyes, playfully hiding a toy behind their back.

Examples

Mi hijo es un demonio, siempre está saltando sobre los muebles.

My son is a little devil; he is always jumping on the furniture.

Trabaja como un demonio para terminar el proyecto a tiempo.

He works like a demon (very hard) to finish the project on time.

¡Qué coche tan rápido! Va como un demonio.

What a fast car! It goes like a bat out of hell (very fast).

The 'Demonios' Expression

When used in questions like '¿Qué demonios dices?' (What the heck are you saying?), 'demonio' acts as an intensifier, showing annoyance or surprise, similar to saying 'hell' or 'heck' in English.

Literal Translation

Mistake: “Using 'demonio' in a formal setting just to mean 'very fast' or 'very hard.'”

Correction: Use this meaning only in informal or passionate conversations, as it is highly colloquial. In formal settings, use 'rápidamente' (quickly) or 'arduamente' (arduously).

Choosing Between 'Bestia' and 'Monstruo'

The most common confusion is between 'bestia' and 'monstruo,' as both are informal terms for a highly skilled person. While they are largely interchangeable in this context, 'bestia' might sometimes carry a slightly stronger sense of raw power or speed, whereas 'monstruo' emphasizes astonishing skill.

Related Translations

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