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"Hola" is a form of "hola", an interjection which is often translated as "hello". "Buenas noches" is a form of "buenas noches", a phrase which is often translated as "good evening". Learn more about the difference between "hola" and "buenas noches" below.
hola
An interjection is a short utterance that expresses emotion, hesitation, or protest (e.g., Wow!).
interjection
a. hello
¡Hola, Meg! - Hola, ¿cómo estás?Hello, Meg! - Hello, how are you?
b. hi
A word or phrase that is commonly used in conversational speech (e.g., skinny, grandma).
(colloquial)
¡Hola! ¿Qué hay de nuevo?Hi! What's new?
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buenas noches(
bweh
-
nahs
 
noh
-
chehs
)
A phrase is a group of words commonly used together (e.g., once upon a time).
phrase
a. good evening
Buenas noches y bienvenidos.Good evening and welcome.
a. good night
Me voy a dormir. ¡Buenas noches!I'm going to sleep. Good night!
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