Thanks Scholiast ! it helps a lotsaluete amici!
I'm unsure what LMatt88 intends 'energy walls' to mean, but I'll do what I can here. moenia (as opposed to muri or parietes) are defensive fortifications around a town or other settlement.
energia is not a Latin word, and is not attested at all in OLD, even as a transliteration from its original Greek, ἐνέργεια. That does not at once rule it out, as Cicero regularly sprinkles his philosophical tracts and letters with Greek words and phrases. Most likely he would write it in Greek (the genitive is τῆς ἐνεργείας), but if he chose to transliterate, he would probably still follow the so-called 'Greek' declension, with energias.
I hope this is of modest help.
As in barriers to inter-dimensional 'travel'? My first thought is moenia energetica, but this may seem a bit clumsy. For economy, this could be reduced to moenia ergetica, which would imply much the same (no coincidence that in modern physics, an 'erg' is a unit of energy—etymologically related to English 'work'), but with the additional nuance of 'functional'. Since this is fiction, LMatt88 can use such a term in more or less any sense he may wish.dimensional walls
Oh technically I was looking for a way to define the energetic barriers that divide the dimensions in my comic book. That's why I also chose "moenia" as well instead of someting like murus. I though it would fit nicely with the role of protecting the dimension similar to a structure of a medieval city.As in barriers to inter-dimensional 'travel'?