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"Caros" is a form of "caro", an adjective which is often translated as "expensive". "Os" is a pronoun which is often translated as "you". Learn more about the difference between "caros" and "os" below.
caro(
kah
-
roh
)An adjective is a word that describes a noun (e.g., the big dog).
1. (costly)
a. expensive
Queríamos comprar un coche nuevo, pero todos son muy caros.We wanted to buy a new car, but they're all so expensive.
b. dear (United Kingdom)
Regionalism used in the United Kingdom
Aunque fueran caras, valió la pena comprar estas botas.Even if they were dear, it was worth buying these boots.
2. (literary) (cherished)
A word or phrase restricted in usage to literature or established writing (e.g., sex, once upon a time).
An adverb is a word that describes a verb, an adjective, or other adverbs (e.g., to run quickly, very tired).
c. high (adjective)
En esa tienda de perfumes lo venden todo muy caro.Their prices are really high in that perfume shop.
d. dearly
Los que ofendieron al capo van a pagar muy caro su error.Those who offended the capo will pay dearly for their mistake.
os(
ohs
)A pronoun is a word that stands in for a noun (e.g., she).
a. you
Os quiero mucho, chicos. Voy a echaros mucho de menos.I really love you, guys. I'll miss you a lot.
a. you
¿Quién os dio entradas de primera fila para el concierto?Who gave you front-row tickets to the concert?
a. yourselves
Os vais a lastimar si seguís jugando con esa rama.You're going to hurt yourselves if you keep playing with that stick.