How to Say "spine" in Spanish
The most common Spanish word for “spine” is “columna” — use 'columna' when referring to the anatomical backbone or spinal column.
columna
koh-LOOM-nahkoˈlumna

Examples
Tengo un dolor en la columna que no me deja dormir.
I have a pain in my spine that won't let me sleep.
La columna vertebral protege la médula espinal.
The spinal column protects the spinal cord.
Vertebral vs. Solo Columna
When talking about the backbone, Spanish often uses the full phrase 'columna vertebral' (vertebral column), but in casual conversation, just 'columna' is understood.
lomo
LO-moˈlomo

Examples
El gato arqueó el lomo cuando vio al perro.
The cat arched its back when it saw the dog.
El título del libro aparece en el lomo.
The book's title appears on the spine.
Cargaron las cajas a lomo de mula.
They loaded the boxes on the mule's back.
Using 'A lomo'
When you want to say something is carried on an animal, use the phrase 'a lomo de'.
Book parts
Mistake: “La espalda del libro.”
Correction: El lomo del libro.
espina
ess-PEE-nahesˈpina

Examples
Ese hombre me da mala espina.
That man gives me a bad feeling / I don't trust him.
Tengo la espina de que algo va a salir mal.
I have a nagging feeling that something is going to go wrong.
La espina dorsal protege la médula espinal.
The spine protects the spinal cord.
Figurative Use
When used figuratively to mean 'feeling,' it almost always appears with 'mala' (bad).
Confusing 'columna' and 'espina'
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