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"Rápidamente" is an adverb which is often translated as "quickly", and "rápido" is an adjective which is often translated as "fast". Learn more about the difference between "rápidamente" and "rápido" below.
rápidamente(
rrah
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pee
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dah
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mehn
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teh
)
An adverb is a word that describes a verb, an adjective, or other adverbs (e.g., to run quickly, very tired).
adverb
a. quickly
El ciclista rápidamente tomó la delantera.The cyclist quickly took the lead.
b. fast
El carro nos pasó rápidamente y no alcanzamos anotar el número de placa.The car passed by us fast and we didn't manage to take down the license plate number.
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rápido(
rrah
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pee
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doh
)
An adjective is a word that describes a noun (e.g., the big dog).
adjective
a. fast
¡Quiero un coche rápido cuando sea grande!I want a fast car when I grow up!
b. quick
El proceso es rápido y sencillo, así que no te preocupes.The process is quick and easy, so don't worry.
An adverb is a word that describes a verb, an adjective, or other adverbs (e.g., to run quickly, very tired).
adverb
a. fast
¡No vayas tan rápido! ¡Me estás asustando!Don't go so fast! You're scaring me!
b. quickly
La mayoría responde rápido a este tratamiento.Most people respond quickly to this treatment.
A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).
masculine noun
a. express train
Cuando fuimos a Japón, tomamos el rápido a Tokio.When we went to Japan, we took the express train to Tokyo.
b. fast train
Los planes para tener un rápido entre Los Ángeles y San Francisco han quedado truncos.Plans for a fast train between Los Angeles and San Francisco are incomplete.
los rápidos
A plural noun indicates that there is more than one person, place, thing, or idea.
plural noun
a. rapids
Bajar por los rápidos del río Colorado fue muy emocionante.Going down the rapids of the Colorado River was very exciting.
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