In order to begin to delve into the establishment of the meaning of the vain term that concerns us, we must first discover its etymological origin. In this sense, we can say that it is a word that derives from Latin, from the adjective "vanus", which can be translated as "empty."
It's about a adjective which can be used with different meanings depending on the context.
Something qualified as vain can lacking substance nucleus , support or foundation . For example: "The president delivered a vain speech, which does not provide any useful information", "I'm tired of listening to empty messages and no television content", “The new architect presented me with a vain project, impossible to support”.
The adjective can also be applied to what It is insignificant, useless or useless : "The bird made some vain attempts to try to escape the trap, but finally got tired", “Raising a few bottles from the beach may seem like a futile job, although any contribution made to the environmental struggle, however small, is important”, "It's a futile effort, but I feel I must do it".
When something is done that the effect expected or that does not allow to reach result that was sought, it is often said that it is an action "in vain": "The woman asked for help in vain since no one came to assist her", "The 27 points of Manu Ginobili were in vain because his team fell in overtime", "The television channel made a millionaire offer in vain to the actor, who did not accept as he planned to take a sabbatical year".
Within the religious field the term that occupies us plays an important role, since it appears in what is the second of the ten commandments existing in the Catholic religion. We are referring to the one that states that “you will not take the name of God in vain”, which means that the name of God should not be used in phrases or exclamations that are not meant to honor him.
In the architecture Finally, it is called in vain hollow space that interrupts a solid surface: "The castle is almost destroyed, although you can still see the openings of the doors and windows".
In Mesopotamia it seems that the origin of this architectural element is already found, which can be of very different types, depending on the form they acquire. Hence, they can be found from rhomboids to circulars, among others.
In the same way, we cannot forget the existence of what is known as an electric span. It is a term that refers to the separation that must exist between what are the different conductors that exist in the laying of a transmission in high and medium voltage. That is, at the distance between support and support.
In addition there is also what is called the engine compartment, which refers precisely to the hole or space in which the engine is placed and which is located under the hood.