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"Solido" is a form of "soler", an intransitive verb which is often translated as "to use to". "Duro" is a form of "duro", an adjective which is often translated as "hard". Learn more about the difference between "solido" and "duro" below.
soler(
soh
-
lehr
)An intransitive verb is one that does not require a direct object (e.g., The man sneezed.).
a. to use to (in past tense)
Solíamos irnos de vacaciones a San Sebastián.We used to go on vacation to San Sebastian.
b. to tend to
Suelen comer mucha comida rápida porque viajan mucho.They tend to eat a lot of fast food because they travel so much.
c. usually (as adverb)
Suele haber muchas fiestas en la playa durante el verano.There are usually a lot of parties on the beach in the summer.
d. to be in the habit of (with "-ing" form)
Sueles llegar a clase cinco minutos antes. ¿Qué ha pasado hoy?You're in the habit of getting to class five minutes early. What happened today?
duro(
doo
-
roh
)An adjective is a word that describes a noun (e.g., the big dog).
1. (not soft)
2. (rigid)
a. stiff
La caja de velocidades se pone dura cuando hace frío.The gearbox gets stiff when it's cold.
3. (strong)
4. (stern)
5. (difficult)
6. (colloquial) (dim-witted)
A word or phrase that is commonly used in conversational speech (e.g., skinny, grandma).
a. stingy
El novio de Laura es bien duro. Nunca invita una ronda de tragos cuando salimos.Laura's boyfriend is really stingy. He never buys a round when we go out.
An adverb is a word that describes a verb, an adjective, or other adverbs (e.g., to run quickly, very tired).
8. (with vigor)
a. hard
Manny Pacquiao y Juan Manuel Márquez se pegaron duro durante la pelea.Manny Pacquiao and Juan Manuel Marquez hit each other hard during the match.
A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).
a. tough guy
El duro de esta película es Sylvester Stallone.The tough guy in this movie is Sylvester Stallone.