Prose
The word "prose" first appears in English in the 14th century. It is derived from the Old French "prose", which in turn originates in the Latin expression "prosa oratio" (literally, straightforward or direct speech).
Arche
Arche (; ) is a Greek word with primary senses "beginning", "origin" or "source of action" (: from the beginning, οr : the original argument), and later "first principle" or "element", first so used by Anaximander (Simplicius in Ph. 150.23). By extension, it may mean "first place, power", "method of government", "empire, realm", "authorities" (in plural: ), "command". The first principle or element corresponds to the "ultimate underlying substance" and "ultimate undemonstrable principle". In the philosophical language of the archaic period (8th to 6th century BC), "arche" (or "archai") designates the source, origin or root of things that exist. In ancient Greek philosophy, Aristotle foregrounded the meaning of "arche" as the element or principle of a thing, which although undemonstrable and intangible in itself, provides the conditions of the possibility of that thing.