How do I say "The Book of Four Keys" in Ancient Greek?

I am trying to figure out how to say “The Book of Four Keys” in Ancient Greek. A friend told me that it was “Biblion Tetra Kleiss,” but to check with someone more knowledgeable.

Wouldn’t you need the genitive plural of “four keys?”

I’d guess βίβλος τεσσάρων κλειδῶν (biblos tessarôn kleidôn), but I’m really posting just to subscribe to the thread.

You forgot the definite article ‘ho’ (I can’t spot omicron with a rough breathing in Charmap).

I was going to tell you to use a combining mark, but it seems that many fonts don’t support that for some reason.

ὁ is in there, but it’s pretty high up. It’s U+1F41, or &#[noparse]8001;[/noparse] in HTML. Under default settings, you can’t get it using the alt key, so I stick with the HTML entity.

Hmm… in what sense is the book ‘of four keys’? If it requires four keys to open, then that’s a property of the book and you might render it as

ὁ βίβλος τετράκλειδῶντος - ‘the 4 keyed book’.