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"Venir" is an intransitive verb which is often translated as "to come", and "oír" is a transitive verb which is often translated as "to hear". Learn more about the difference between "venir" and "oír" below.
venir(
beh
-
neer
)An intransitive verb is one that does not require a direct object (e.g., The man sneezed.).
2. (to return)
5. (to occur)
a. to get 
Me viene sueño en el trabajo después de almorzar.I get drowsy at work after having lunch.
A nosotros nos vino una gripe terrible.We got a terrible flu.
a. to come 
Lo mejor está por venir.The best is yet to come.
Ahora viene la escena que me gusta.The scene I like is coming up.
b. next  (followed by a timeframe)
La semana que viene estaré trabajando desde casa.I'll be working from home next week.
El año que viene visitaremos Japón.Next year we're traveling to Japan.
a.  no direct translation
This refers to an idiomatic word or phrase for which there is no word-for-word translation.
Unas largas vacaciones ahora me vendrían bien.A long vacation now would do me nicely.
Estas botas me vendrán bien cuando haya mucha nieve.These boots will come in handy when it's very snowy.
b. to work for 
¿Te viene bien reunirnos mañana a las 4 pm?Does meeting at 4 pm tomorrow work for you?
a. to pick up 
Avísale a Sofía que sus amigas han venido por ella.Tell Sofia her friends have come to pick her up.
b.  no direct translation
This refers to an idiomatic word or phrase for which there is no word-for-word translation.
¿Vino el mensajero a por el contrato?Has the messenger been to pick up the contract?
Venimos a por el perro.We're here to collect the dog.
An auxiliary verb, or helper verb, is a conjugated verb that comes before a main verb and determines the main verb's tense, mood, or aspect (e.g., I have gone.).
venirse
A reflexive verb is a verb that indicates that the subject performs an action on itself (e.g., Miguel se lava.). 
a. to come 
Se vino una tormenta mientras nadábamos en la playa.A storm came upon us when we were swimming at the beach.
El perro se vino sin ser llamado.The dog came without being called.
17. (to return)
18. (colloquial) (sexual)
A word or phrase that is commonly used in conversational speech (e.g., skinny, grandma).
a. to come  (colloquial)
A word or phrase that is commonly used in conversational speech (e.g., skinny, grandma).
Se vino en tan solo unos minutos.She came in just a few minutes.
oír(
oh
-
eer
)A transitive verb is a verb that requires a direct object (e.g., I bought a book.).
a. to hear 
Las paredes son tan finas que oigo a los vecinos hablar.The walls are so thin I can hear the neighbors talking.
a. to hear 
Me quejé a mucha gente, pero nadie quiso oírme.I complained to many people, but nobody wanted to hear me.
a. to get  (colloquial)
A word or phrase that is commonly used in conversational speech (e.g., skinny, grandma).
“No lo vuelvas a hacer, ¿me oyes?” dijo el maestro."Don't do it again, got it?" said the teacher.
oírse
A pronominal verb always uses a reflexive pronoun. (e.g., Te ves cansado.).
A reciprocal verb is a verb that indicates that two or more subjects perform an action on each other (e.g., Ellos se abrazan.).
a. to hear each other 
Fue una llamada muy frustrante porque no nos oíamos nada.It was a very frustrating call because we couldn't hear each other at all.