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"Listo" is a form of "listo", an adjective which is often translated as "smart". "Preparado" is a form of "preparado", an adjective which is often translated as "prepared". Learn more about the difference between "listo" and "preparado" below.
listo(
lees
-
toh
)An adjective is a word that describes a noun (e.g., the big dog).
2. (prepared)
An interjection is a short utterance that expresses emotion, hesitation, or protest (e.g., Wow!).
4. (all right) (Latin America)
Regionalism used in Latin America: all the countries in South America, Central America, and the Caribbean. Does not include Spain.
preparado, el preparado(
preh
-
pah
-
rah
-
doh
)An adjective is a word that describes a noun (e.g., the big dog).
A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).
3. (medicine)
a. preparation
El doctor me recetó un preparado para la tos.I was prescribed a cough preparation by the doctor.