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"Listo" is a form of "listo", an adjective which is often translated as "smart". "Risa" is a noun which is often translated as "laughter". Learn more about the difference between "listo" and "risa" 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.
la risa(
rree
-
sah
)A feminine noun is almost always used with feminine articles and adjectives (e.g., la mujer bonita, la luna llena).
1. (general)
a. laughter (uncountable)
La risa de ese niñito es contagiosa.That little kid's laughter is infectious.
b. laugh (countable)
Malena tiene una risa como nadie que jamás he conocido.Malena has a laugh like nobody else I've ever met.