From the Latin word for wall, murus.I had no idea “mural” was a word in English. Go figure...
It is exactly the same word in Portuguese. It is related to “muro” (wall).
Interestingly, in the English language, the word mural can be used in the same form as a noun, as an adjective, and as a verb. Nothing wrong with Andrew Hunter using the verb "muralized," but arguably in that context, he would have been more correct to say "about to be muralled." Why? Because to "mural" a wall is to create a piece of artwork on a wall, whereas the suffix "-ize" means to "conform to or resemble something," ie., "muralize" means to change something to resemble a mural. just a subtle difference.
Ok, thus ends the English lesson.