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"Immersed" is a form of "immersed", an adjective which is often translated as "inmerso". "Immerse" is a transitive verb which is often translated as "sumergir". Learn more about the difference between "immerse" and "immersed" below.
immerse(
ih
-
muhrs
)A transitive verb is a verb that requires a direct object (e.g., I bought a book.).
a. sumergir 
The dried mushrooms will swell when you immerse them in water.Las setas secas se inflarán cuando las sumerjas en agua.
2. (figurative) (to absorb oneself)
A phrase used as a figure of speech or a word that is symbolic in meaning; metaphorical (e.g., carrot, bean).
a. sumergirse 
I wanted nothing more than to immerse myself in a book for a couple of hours.Lo único que quería era sumergirme en un libro un par de horas.
b. meterse de lleno 
He immersed himself in the Sami way of life, learning their language and sharing their hardships.Se metió de lleno en el estilo de vida de los Sami, aprendiendo su idioma y compartiendo las privaciones que sufrían.
3. (religious)
a. bautizar 
When the priest immerses you, you are sanctified by the holy water.Cuando el cura te bautiza, el agua bendita te santifica.
immersed(
ih
-
muhrst
)An adjective is a word that describes a noun (e.g., the big dog).
1. (figurative) (focused)
A phrase used as a figure of speech or a word that is symbolic in meaning; metaphorical (e.g., carrot, bean).
a. inmerso  (figurative)
A phrase used as a figure of speech or a word that is symbolic in meaning; metaphorical (e.g., carrot, bean).
Ava would spend the day lying by the swimming pool, immersed in a book.Ava se pasaba el día tumbada al borde de la piscina, inmersa en un libro.
b. absorto 
I was so immersed in the music that I didn't hear the telephone.Estaba tan absorta en la música, que no oí el teléfono.
c. sumido 
The country is immersed in a civil war that seems to have no end.El país está sumido en una guerra civil que parece no tener fin.
d. enfrascado 
Their top executives are now immersed in talks to try and save the company.Los altos directivos están ahora enfrascados en negociaciones, intentando salvar la empresa.