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"Preciosa" is a form of "precioso", an adjective which is often translated as "beautiful". "Muchas gracias" is a phrase which is often translated as "thank you very much". Learn more about the difference between "muchas gracias" and "preciosa" below.
muchas gracias(
moo
-
chahs
grah
-
syahs
)A phrase is a group of words commonly used together (e.g., once upon a time).
1. (general)
b. thanks a lot
Muchas gracias por llevarme al aeropuerto.Thanks a lot for taking me to the airport.
precioso(
preh
-
syoh
-
soh
)An adjective is a word that describes a noun (e.g., the big dog).
1. (pretty)
a. beautiful
La vista desde la peña está preciosa.The view from the cliff is beautiful.
Este es un broche precioso. ¿Dónde lo compraste?This is a beautiful brooch. Where did you buy it?
b. gorgeous
Estás preciosa con tu nuevo vestido y tu nuevo corte de pelo.You look gorgeous with your new dress and your new haircut.
c. lovely
Es un día precioso. ¿Por qué no damos un paseo en el parque?It's a lovely day. Why don't we go for a walk in the park?
2. (of value)
This means that the noun can be masculine or feminine, depending on the gender of the noun it refers to (e.g., el doctor, la doctora).
b. sweetheart
No te preocupes, preciosa. Todo saldrá bien, ya verás.Don't worry, sweetheart. Everything will be ok, you'll see.