How to Say "instinct" in Spanish
The most common Spanish word for “instinct” is “instinto” — use 'instinto' when referring to a natural, biological, or innate urge or feeling that guides behavior, like the will to survive..
instinto
een-STEEN-toh/inˈstinto/

Examples
El instinto de supervivencia es lo que nos mantiene vivos.
The survival instinct is what keeps us alive.
Las aves migran por instinto cada año.
Birds migrate by instinct every year.
Actuó por puro instinto al ver el peligro.
He acted purely by instinct upon seeing the danger.
Using 'Por' with Instinct
When you want to say someone or something did something 'by instinct,' use the preposition 'por' (e.g., 'por instinto').
Gender Error
Mistake: “La instinto”
Correction: Instinto is always masculine: 'El instinto'. Even though it ends in 'o', it's important to remember the article 'el'.
impulso
/eem-POOL-soh//imˈpulso/

Examples
Compró el coche por un impulso, sin pensarlo mucho.
He bought the car on an impulse, without thinking about it much.
Sentí el impulso de levantarme y aplaudir.
I felt the urge to stand up and applaud.
Using Prepositions
When talking about acting on a sudden urge, Spanish uses the preposition 'por' (by/for) or 'de' (of): 'Actué por impulso' or 'Tuve el impulso de llamar.'
Confusing 'Impulso' and 'Impulsividad'
Mistake: “Using 'impulsividad' when referring to a single action.”
Correction: 'Impulsividad' is the personality trait (being impulsive), while 'impulso' is the singular action or feeling that leads to the act. Say: 'Fue un impulso' (It was an impulse).
radar
rah-DAR/raˈðaɾ/

Examples
Mi hermana tiene un radar para encontrar ropa de segunda mano barata.
My sister has an instinct for finding cheap second-hand clothes.
Parece que el jefe tiene un radar para saber quién no está trabajando.
It seems the boss has a sixth sense for knowing who isn't working.
Figurative Usage
When used figuratively, 'radar' always means having a strong, almost automatic ability to notice something specific, like 'a radar for danger'.
Instinto vs. Impulso
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