Nano-technology - Not Sufficiently Advanced, as per the Arthur C. Clarke gold standard of sufficiently advanced technology.
The proper names and descriptions of a sword’s parts.
While we’re talking about the subject of constructing religions, I’d like to bring up the concept of the Creed. The creed is nothing more than a simple statement of the religion’s beliefs, meant to be recited. If you cannot write a creed for your monotheistic religion, it probably needs work on internal consistency. Creed examples:
Poison can only ever be the tool of a murderer - as such, alchemists are tightly regulated by the Crown, and anyone found in posession of an unknown substance is forced to taste it themselves.