"Περισσότερο κοινό."

[JamesTWils]

Doesn't this mean more spectators, a larger audience? "More public" sounds like an adjective. "Their conversation was more public than ours."

[jaye16]

It is a bit of all you said. I've just added more common. "Public" here without context can be as you say an adjective or a noun as the other words in the hints. Thank you for your observation.

[JamesTWils]

Thanks for clearing that up. I know it as an adjective for the Hellenistic variety of common Greek, but I would never have guessed this noun meaning.

[jaye16]

Glad to be able to help. It's interesting to see how words change over time.

[gpbalis]

Thanks for adding common as I have always used κοινο as meaning common.

είναι κάτι κοινό :-D

[Glossmad]

I was marked wrong for 'a bigger audience'. 'More public' doesn't sound like proper English.

[jayfender]

I think "public" should not be used as a noun when preceded by "more". "More public" has a meaning similar to "less private" - it's an adverb/adjective pair. I would not understand "more public" to mean "more common people" or "more of the public" as i think this Greek phrase is trying to say

[jaye16]

Yes, you have a good point. I think we'd do well to give the Greek sentence more context so as to have a better translation. We can't do that at present but we'll keep it in mind for the new tree. Thank you.

[britomat]

I got marked right for 'more audience' didn't mean anything.

[jaye16]

"audience" is uncountable so we don't use "more" we could say a "larger audience"or a "bigger audience".

[AniruddhaJ20]

Does the word "Koine" as in "Koine Greek" have the same origin as that of the word Κοινό?

[D_..]

Yes, it is κοινός, κοινή, κοινό and it means common. Wiktionary is usually good for this kind of etymological questions :)
https://en.wiktionary.org/wiki/Koine