Is there a “White Black” prototypical character in the Balkan, Turkish, Middle Eastern, or Arabic folklore or fairy tales?

Not aware of one in Greek folklore. Lots of Arapis in Greek fairy tales, filling the same niche as ogres and giants—sometimes benevolent, sometimes malicious, but always exotic. But not aware of White Arapis.

What are your five favourite operas?

I… don’t actually like opera, with the following exceptions. So my answers are (a) not representative, and (b) damn good, if they got past my “I don’t like opera” filter.

  • John Adams, Nixon in China.
  • Alban Berg, Wozzeck.
  • Wolfgang Mozart, Don Giovanni.
  • Richard Strauss, Der Rosenkavalier.

Need a fifth, OK:

  • Benjamin Britten, Peter Grimes.

Thirty years ago, but I remember liking it at the time.

EDIT: Strike that. I meant to say

  • Philip Glass, Akhnaten.

What is the etymology of Istanbul?

Uncontroversially: from the Greek εις την Πόλιν [is tim polin], “to the City”—The City being the informal name of Constantinople in Greek, to this day. There is at least one similar Turkish placename:  İstanköy is the Turkish for Kos (εις την Κω /is tin ko/).

There are some uncertainties about why it ended up as İstanbul instead of İstinbul. In fact there’s a paper I stumbled on in academia.edu, quoting me to support a Tsakonian origin for the /a/. (Impossible, the Tsakonians wouldn’t have shown up next to Erdek until 1700, and we’re talking two villages. But it’s nice to be quoted.)

Why are deixis and seismic pronounced like that?

I referred to my wrong answer in Nick Nicholas’ answer to What is it like to be able to fluently speak Klingon?. The oddity is also commented on in Pedro Alvarez’s answer to What English word is pronounced the most differently from the way it is spelled?

Here’s the deal, from the appendix to Vox Graeca

Greek had a diphthong ει. It was a diphthong in Homeric Greek, /ei/, but by Attic it was /eː/, and had merged with what was in Homeric Greek /e.e/, εε. By Roman times, it was pretty much /i/, and it is transliterated into Latin as <i>. So Εἰρήνη Irene, εἰδύλλιον idyll, συμπάθεια sympathia > sympathy.

Because most Greek loans came into English via  Latin—or were spelled as if they did—we rarely get a Greek word in English spelled with an <ei>.

But there are exceptions. Such as deixis and seismic.

So. How to pronounce those?

If you pronounced ει in your Greek like Modern Greek, or even like the Romans did, you would be pronouncing it as an /i/. It would end up [sɪzmɪk, dɪksɪs].

That’s not what happened. Greek was being taught in England with Erasmian pronunciation: an attempt to approach the original pronunciation. Because Greek spelling is conservative, that would end up as a diphthong. And the diphthong that ει looks like (and indeed was in Homeric times) was /ei/.

That’s fine. English has an /ei/ diphthong, so that won’t be a problem. We can just tell people to say δεῖξις as in “day-xis”, σεισμικός as in “say-smi-koss”.

So what happened?

Well what happened is that the [eɪ] pronunciation of long a in English is recent. Like, 18th century recent. Which is why in Scots long a still has its older pronunciation of /eː/.

So if you’re teaching Ancient Greek in England in the 17th century, you have a problem. You know that ει sounds like [eɪ], but if you’re teaching it in 17th century English, there is no English sound corresponding to [eɪ]! Certainly not long a.

So they did the next best thing. (For some bizarre notion of “next best”.) They picked the nearest diphthong available in the English of the time.

They picked long i.

And when English did pick up the [eɪ] sound, it was too late. The teaching of Greek in England was stuck on [aɪ] as the pronunciation of ει. And when Greek words were borrowed afresh into English, with the <ei> spelling, they took the 17th century teaching pronunciation with them. σεισμικός was taught as [saismikos], so seismic was pronounced as [saɪzmɪk].

Language. You can’t make this shit up.

Did the era of the ancient Greeks happened before the flood or during the biblical period and how long did their time last?

Without getting into the issue of how much of Genesis is historical and how much is wishful thinking:

The Babylonian captivity, which can be independently verified from archaeology, was 580 to 530 BC. That’s when the Hebrew Scriptures as we know them were consolidated.

Omri is the first independently verified King of Israel, and he was around 880 BC.

Our first historical evidence of the Greeks is in Linear B, which goes up to 1200 BC; but the era of the Ancient Greeks as we know them starts with Greek writing, around 770 BC. Any Greek you’ve heard of by name, other than Homer, is 7th century BC or later.

So the era of the ancient Greeks starts two to three centuries after David (if there was a David), and a lot longer than that after the Flood (if there was a Flood).

I want to be a linguist focusing on conserving languages. Should I do it?

What my betters have said, with both the pros and cons from Don Grushkin’s answer.

Be aware of the following constraints:

  • Don’t get too caught up in what language you work on. A friend of mine came to Australia to write a grammar of an Aboriginal language, any Aboriginal language. There’s 20 healthy languages left, and they’ve been recorded—it’d be detail work now. He ended up going to Papua New Guinea. You go where your prof sends you. Which is why the wise thing to do is to chose your prof before your prof chooses you.
  • Don’t go in thinking you’re a saviour. Language communities particularly in places like Canada and Australia are very attuned to that attitude. You’re a partner to them, and the community owns the language, not you. You will need to be humble, and you will need to run lots past them. There will be post-colonial resentment to face. And your name may not be up in lights in the grammar and dictionary as much as you’d like. This happened to another contemporary of mine (who has since abandoned linguistics); I know I have too much of an ego to deal with it.
    • Someone in a paper I read sneered about linguists ending up doing feelgood welfare work for language communities (see many of the other answers here). If you’re working on language revival, be aware that your aspiring speakers of the language are not professional linguists, and you will have to dumb things down.
  • You know how the CIA did not have enough human intel in Afganistan before 9/11, because “noone wants to sign up for a lifestyle of dysentery”, as they said at the time? Well, same with fieldwork. There is a reason that most of what we know about Papua New Guinea languages comes from missionaries. For that matter, there’s a reason why Vanuatu, which has an even denser concentration of languages, is not well-documented linguistically: the government has banned the missionaries. 
  • The language communities you work with may be an infighting, petty, small-minded bunch of loons. You may get attitude like, “If you speak to that side of the village for data, noone from this side of the village will ever speak to you.”
  • The linguist colleagues will definitely be an infighting, petty, small-minded bunch of loons. I wrote a jeremiad about my personal experience with obtaining a linguistics degree; including having to “step on corpses” to get an academic job. It will be worse in anthropological/fieldwork linguistics. Moreover, there’ll be less places you can get a job. I am from Australia, which is fieldwork country. The only countries our linguists are on speaking terms are West Coast US, Germany and Netherlands (thanks to the Max Planck Institute), and a couple of guys in Japan.

Don’t let this talk you out of it. At all. Just be aware—even more so than anyone considering a career in linguistics in general. Be prepared for some disillusionment.

And from what I gather from those I know that have stuck with it: be prepared for some life-changing, life-long friendships too.

In Greek, how do you say “tasty”?

νόστιμος, /nostimos/.

The etymology (yes, that’s what I do) is odd. The primary meaning of nostos, the word that nostimos is derived from, is “return”: it’s the word for Odysseus’ return to Ithaca.

Wheat gives a rich return on investment, so nostos also means the yield of ground grain. Hence the adjective means “abundant”, referring to foodstuff; and from there, “wholesome, succulent, nutritious” by Roman times.

As Liddell–Scott tells you.

What do you do when faced with a vague Quora question, not giving details?

Sometimes, I ask for clarification in comments. Much more rarely, I’ll answer after the clarification. (Questions aren’t the asker’s, they’re the community’s. They aren’t mine either.)

Sometimes—more often than some, possibly: I answer anyway. On occasional, I even answer a question related to the question answered.

Hey, ask a broad question, get all sorts of answers.

What cultures don’t value gold?

Australia during the gold rush?

I can’t find online corroboration of this, probably because I read this on a tourist placard somewhere. But apparently when Prince Alfred came to visit Australia in 1868, the streets of Bendigo (or was it Ballarat?) were paved with silver.

Gold was too plentiful.