The word Immersion comes from the Latin "Immersio", a term that is used to indicate the action of introducing a solid (either a thing or a human being) into a liquid substance. In this case, when it comes to a submarine that has entered the ocean, it is said that it was immersed in it, or when people are inspecting the ocean, that is, divers when introducing their body into the sea. perform a dive action, for example, "In yesterday's dive I had the opportunity to meet marine species that I had not seen before", "The submarine's dive was delayed 15 minutes due to lack of personnel. " The immersion action can be carried out in any aqueous body.
In addition, in some religions, baptism by immersion is carried out to begin with, which is the same way of introducing a person into the water, but from the point of view of Christianity, baptism is a sacrament and the purpose of performing the Baptism by immersing a person in water is to clean or wash the impurities or sins with which the person was born or has committed throughout his life, and they do it in this way because they consider it an ordinance of Christ.
In another context, there is also talk of mental immersion which can be real or imaginary, that is, the psyche of a human being can be so deeply concentrated on something in particular that it is said that the same being is immersed in that environment. An example of an imaginary psychological immersion can be when you read a book of considerable interest to your reader, you are so immersed in reading that you can feel one more character in the plot and thus feel the fantasy of living the story.
There is also linguistic immersion, which includes the study of a language, but to be able to learn it correctly you have to live in the country of origin of the language, in order to complete the learning with experiences properly lived.