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el cloro

chlorine, bleach, a pee, a piss

ˈk l o ɾ o
noun · masculine Rare #55,731
chlorine The chemical element; in swimming pools, this usually refers to the chlorine used to disinfect the water.
SP: El cloro de la piscina puede irritar la piel.
EN: The chlorine in the pool can irritate the skin.
bleach In many Spanish-speaking regions, cloro also means household bleach.
SP: Usa cloro para limpiar el baño.
EN: Use bleach to clean the bathroom.
a pee, a piss Colloquial and regional; used in the expression echar un cloro, meaning “to pee.”
SP: Voy al baño a echar un cloro.
EN: I'm going to the bathroom to take a piss.

Tengo que ir al baño para echar un cloro.

I need to go to the bathroom to use bleach.

Pero Karina dijo que la piscina le hizo daño a su cabello por tanto cloro.

But Karina said the pool damaged her hair because of all the chlorine.

— Hoy Quiero Volver Solito (2014)

¿Le echaste cloro a mi uniforme?

Did you bleach my uniform?

— Amores perros (2000)

Sounds similar to

claro ˈk l a ɾ o