Pared vs. muro vs. muralla
The Spanish language has multiple words for wall, including pared, muro, and muralla. Each word can be used in slightly different contexts to refer to distinct types of walls.
Pared
A1A wall within a house or building, which separates rooms from each other. This type of wall cannot usually stand on its own without the structure of the building.
La pared de mi habitación es azul.
(The wall of my room is blue.)
Vamos a colgar el cuadro en esa pared.
(We are going to hang the picture on that wall.)
Muro
A2A strong and robust wall that can stand independently, usually found on the outside of buildings. It is also used to refer walls used for boundaries or separators like garden walls.
El muro del jardín está cubierto de hiedra.
(The garden wall is covered in ivy.)
Hay un muro alrededor de la casa para la seguridad.
(There is a wall around the house for security.)
Muralla
B1Refers specifically to defensive walls, like those found around a castle or city. It denotes a large, imposing structure with a purpose of protection and defense.
"La Muralla" es una famosa canción tradicional china.
(The Great Wall is a famous traditional Chinese song.)
La antigua muralla de la ciudad aún se conserva hoy en día.
(The old city wall still stands today.)
Summary
Pared, muro and muralla are all Spanish words that can be translated as wall. However, they refer to different types of walls. Pared is typically an interior wall within a building, while muro refers to an external or boundary wall. Muralla specifically describes large defensive walls, such as those around cities or castles.