QUICK ANSWER
"Encontrarse" is a pronominal verb which is often translated as "to be", and "sentirse mal" is an intransitive verb phrase which is often translated as "to feel bad". Learn more about the difference between "encontrarse" and "sentirse mal" below.
encontrarse(
ehng
-
kohn
-
trahr
-
seh
)A pronominal verb always uses a reflexive pronoun. (e.g., Te ves cansado.).
a. to be
La playa se encuentra al otro lado de la calle.The beach is on the opposite side of the street.
2. (to sense)
a. to run into
¿Has visto a tu ex recientemente? - Sí. Nos encontramos en el metro hace unas semanas.Have you seen your ex recently? - Yes. We ran into each other on the metro a couple of weeks ago.
b. to run across
Ayer me encontré con Francisca. No sabía que estaba embarazada.I ran across Francisca yesterday. I didn't know she was pregnant.
c. to bump into
La semana pasada me encontré con tu hermano. Se ve más sano.I bumped into your brother last week. He looks healthier.
encontrar
A transitive verb is a verb that requires a direct object (e.g., I bought a book.).
7. (to uncover)
a. to discover
Ellos encontraron una caja vieja en el bosque.They discovered an old box in the forest.
b. to encounter
Encontramos una bifurcación en el sendero y no sabíamos qué dirección tomar.We encountered a fork in the road and didn't know which path to take.
a. to find
¿No te gusta ir al teatro? - No, lo encuentro muy aburrido.Don't you like to go to the theater? - No, I find it very boring.
sentirse mal(
sehn
-
teer
-
seh
mahl
)An intransitive verb phrase is a phrase that combines a verb with a preposition or other particle and does not require a direct object (e.g., Everybody please stand up.).
a. to feel bad
No tienes por qué sentirte mal por lo que pasó. No fue culpa tuya.You don't have to feel bad about what happened. It wasn't your fault.
2. (physically)
a. to feel bad
Si te sientes mal, puedo detener el carro para que salgas a tomar aire fresco.If you feel bad, I can stop the car so you can get some fresh air.
b. to feel ill
¿Dónde está Benito? - Se sentía mal y se ha ido a casa.Where's Benito? - He was feeling ill and he went home.