It is a prefix with several uses, such as the marking of verbal participles; or the beginning, time or end of an event; or the creation of collective nouns, with a relationship of union; or also to indicate in a noun that it is the result of an action mentioned by a verb; and has a similar use to the 're-' in Spanish, as an intensifier that is put into words to indicate that "it is much, long, durable".
