AXEINOS → EUXEINOS → KARADENIZ → ?
Why Is the Black Sea Called the Black Sea?
462 BC → TODAY · one sea, several hypotheses
Why is the Black Sea “black”? One influential explanation says that, in an old system of colours and directions, black stood for north. But the medieval documents complicate the story: names meaning “Black Sea” appear in several languages, and the exact trail of the designation is not established.
Jump to the documentary traces
- ?473 BC
- Euxeinos — the oldest surviving trace, date uncertain
- 462 BC
- Axeinos — regarded as older, attested second
- 1338
- Mare Nigrum — Pascal of Vittoria, from Almaliq

KARA
Four forms, four statuses:
- AXEINOS regarded as older · Pindar, Pythian 4.203, 462 BC
- EUXEINOS attested first · Pindar, Nemean 4.49, ?473 BC
- KARA DENIZ the northern hypothesis · first Ottoman attestation unestablished
- BLACK SEA modern form · no proven chain
Why Is the Black Sea Called the Black Sea?
On the standard account, the modern name comes through Turkish Karadeniz — kara means “black”, but historically it also served as a term for the north. Hence “the northern sea”, in an older system where colours could mark compass points; the exact chain of transmission is not documented, though. The name is the last link in a far older chain: the Greeks knew the sea as Axeinos and then Euxeinos, and the first of these probably goes back to an Iranian root.
The first name · Greek
The Unwelcoming
One influential explanation starts from a reconstructed Iranian term, *axšaina-, “dark coloured”. The Greeks would have reinterpreted the form as Áxeinos, “inhospitable” — then softened it into Eúxeinos. Schmitt calls the derivation “generally accepted”; it has also been challenged.
*axšaina-
“dark coloured”
The reconstructed Iranian term behind Axeinos, after Vasmer, quoted by Schmitt. Cognate with Avestan axšaēna- and Old Persian axšaina-.
RECONSTRUCTED
Póntos Áxeinos
“the inhospitable sea”
Regarded as older by all the ancient authors, yet attested only in Pindar, Pythian 4.203, 462 BC. The “inhospitable” sense comes from popular etymology. (Schmitt prints “4.263”, a numbering the current editions do not share.)
ATTESTED
Eúxeinos
“hospitable”
The euphemism that replaces the ill-omened name. Oldest surviving attestation: Pindar, Nemean 4.49 — if the ode's dating (?473 BC) is correct; then into common use.
ATTESTED
Once, in Euripides (Iphigenia in Tauris, 107), the sea is Póntos Mélas — “may be” a poetic metaphor, not a foreign calque.



axeinos → euxeinos · regarded as older, attested second
The second name · a hypothesis
The compass hypothesis
Turkish kara keeps two senses: black and, archaically, north. Hence an attractive idea: if black stood for north, Kara Deniz would be “the northern sea”. The idea is influential — and disputed.
What the dictionary says: kara
From Ottoman Turkish kara ← Old Anatolian Turkish qara ← Proto-Turkic *kara (“dark, black”).
- adjective: black, dark
- noun, archaic: north
A clue from the wind vocabulary
karayel = kara + yel: “a wind blowing from the north-west, usually cold, sometimes of storm strength”. It shows kara living in directional vocabulary — without proving the etymology of Karadeniz.
The second point: Akdeniz
Akdeniz = ak (“white”) + deniz (“sea”), from Ottoman Turkish Ak Deñiz. That the Mediterranean would be “the western sea” belongs to the same hypothesis: in traditional orientation systems, white may stand for west.
The hypothesis: four colours, four points
After Schmitt, an old system paired colours with directions: black for north, red for south, white for west, green or light blue for east. The symbolism is widely attested — Schmitt cites Knobloch — but that the name Karadeniz was born as “the northern sea” remains an interpretation.
- Nblack · karanorthKaradeniz — the Black Sea
- Sred · kızılsouth, only inside the systemKızıldeniz — the Red Sea
- Wwhite · akwest, only inside the systemAkdeniz — the Mediterranean
- Egreen or light blueeastno colour-sea carries this point
DISPUTED
A note: an Anatolian variant (Calvet) reads ak as south. Noted; not adjudicated.
The strongest counter-case: Karatay (2011) shows that forms meaning “Black Sea” appear in Hungarian documents from the early 13th century, then in Snorri (c. 1230) — before the Anatolian sources offer a comparable chain.
Why not the Scythians: a people north of the sea cannot call its southern sea “northern” (Schmitt).
An interpretive model — not a proven etymology.



Modern forms · separate traces
Modern forms and their traces
Karadeniz, Marea Neagră, Chyornoye more, Black Sea — four modern forms, four separate histories. Who translated first, and exactly when, is unknown; the page draws no arrows between them.
After Schmitt, the modern names reach back no further than the 13th century — and the 13th century already brings “black” forms in Hungarian and Norse, not a documented Ottoman chain.
Schmitt again: the old name “seems to have” survived in the Near East until the Turks borrowed and propagated it anew. An attributed continuity, still unproven.
Each form on its own
- Karadeniz — Turkish · first Ottoman attestation unestablished here
- Marea Neagră — Romanian · first attestation unestablished here
- Chyornoye more — Russian · first attestation unestablished here
- Black Sea — English · first attestation unestablished here
a list, not a chain.
- 1484: Cetatea Albă and Kiliia pass under Ottoman rule — without dating the name Karadeniz.
- 1878: Northern Dobruja joins Romania — without dating the name Marea Neagră.


The centrepiece · a documentary timeline
Traces, not masters
Seven traces: five dated attestations, two unknowns. No change of master stands in for proof of the name.
Evidence filter:
?473 BC
EUXEINOS
Pindar, Nemean 4.49. The oldest surviving trace — if the ode's dating is correct.
C09
ATTESTED
462 BC
AXEINOS
Pindar, Pythian 4.203. Regarded as older, attested second.
C07
ATTESTED
early 13th c.
“BLACK” FORM
Hungarian document, quoted by Karatay 2011. The exact form is not given here.
C18
ATTESTED
c. 1230
SVARTAHAF
Snorri Sturluson, Heimskringla — traditional attribution.
C19
ATTESTED
1338
MARE NIGRUM
Pascal of Vittoria, letter from Almaliq, 10 August.
C20
ATTESTED
?
KARADENIZ
The first Ottoman attestation is not established in this documentation.
—
DATE UNKNOWN
?
MAREA NEAGRĂ
The first Romanian attestation is not established in this documentation.
—
DATE UNKNOWN
Explorer · the hypothesis rose
How the hypothesis works
Four points, four colour-words, three seas. Choose a cardinal point: the rose turns and shows what the model says — not what has been proven.
Point N · 1 of 4462 BC → today
Karadeniz — the Black Sea
kara · blacknorth
C04
The clue from the wind
karayel
kara + yel · wind from the north-west
C02
An interpretive model — not a proven etymology.
The rose, in brief
| Point | Colour | Direction | Sea | Source |
|---|---|---|---|---|
| N | kara · black | north | Karadeniz — the Black Sea | C04 |
| S | kızıl · red | south — only inside the system | Kızıldeniz — the Red Sea | C04 |
| W | ak · white | west, only inside the system | Akdeniz — the Mediterranean | C03–C04 |
| E | green or light blue | east | no colour-sea carries this point | C04 |
Why doesn't it close the case?
- “Black” forms appear in Hungarian (early 13th c.) and Norse (c. 1230) — ahead of any documented Ottoman chain.
- Pascal of Vittoria writes Mare Nigrum in 1338, with no Turkish compass in sight.
- Karayel shows kara living in directional vocabulary; it does not prove the etymology of Karadeniz.

Play · six rounds
Attested, reconstructed, or hypothesis?
Six claims about the sea's name. Choose each one's status: what is attested, what is reconstructed, what stays a hypothesis.
Three moments · three numbers
The numbers
Three numbers hold the whole piece.
?473 BC
Euxeinos, the oldest surviving trace
Pindar, Nemean 4.49 — date uncertain
462 BC
Axeinos, regarded as older
Pindar, Pythian 4.203 — attested second
3 seas · 4 points
Three seas pinned to four points
computed from the rose
Four errors · four corrections
The myths
Four things often said about the sea's name. All four fall.
The sea is called black because its deep water is oxygen-free.
We have no evidence that the modern name comes from anoxic water: “The name Black Sea is not derived from the color of the water or from any climatic particulars, as previously had been supposed” (Schmitt). One influential explanation ties it to the old symbolism of colours and cardinal points — but the exact origin stays disputed. The deep-water measurements live at their source: The Black Sea, two storeys →
The Scythians named it.
No. The Scythians lived north of it — a northern people cannot call its southern sea “northern” (Schmitt).
Euxeinos was the friendly name all along.
No. The friendly name is the cover-up: the euphemism replaced an ill-omened Axeinos (C08–C09). Histria is the colonisation context, not the date of the change.
“Kızıl” means south.
No. Red is south only inside the colour-compass system; the dictionary gives kızıl no cardinal sense (C05).
Sources
Strong sources first: Schmitt, Pindar (Perseus), Strabo, Karatay, Yule. Dictionaries stay lexical aids. Every risky claim points at its source.
| C01 | kara = black + north (archaic); the OT ← OAT ← PT *kara chain — a lexical aid | Wiktionary: kara |
|---|---|---|
| C02 | karayel = kara + yel, wind from the north-west — a clue, not proof | tr.wiktionary: karayel |
| C03 | Akdeniz = ak (“white”) + deniz; “west” only as an in-system symbolic sense | Wiktionary: Akdeniz |
| C04 | the colour-direction system (after Knobloch); “Northern Sea” as interpretation; the Achaemenid hypothesis; Scythians excluded | Schmitt, Iranica |
| C05 | kızıl with no cardinal sense of its own; red = south only in-system | Schmitt, Iranica (framing) |
| C06 | Axeinos from reconstructed Iranian *axšaina- “dark coloured” (Vasmer); derivation challenged too | Schmitt, Iranica |
| C07 | Axeinos in Pindar, Pythian 4.203 (Schmitt prints “4.263”), 462 BC | Pindar, Pythian 4 (Perseus) |
| C08 | popular etymology toward a-xeinos “inhospitable” | Schmitt, Iranica |
| C09 | the Euxeinos “hospitable” euphemism, in Pindar, Nemean 4.49 (?473 BC, date uncertain) | Pindar, Nemean 4 (Perseus) |
| C10 | Strabo: Axine → Euxine; the sea often simply “the Pontus” | Strabo 7.3.6, Perseus |
| C10b | Póntos Mélas in Euripides: “may be” a poetic metaphor | Schmitt, Iranica |
| C11 | modern forms reaching back only to the 13th century | Schmitt, Iranica |
| C12 | the old name surviving; the Turks spreading it anew | Schmitt, Iranica |
| C13 | the name not from the water's colour | Schmitt, Iranica (quoted) |
| C14 | the oxygen-free deep: modern measurements, at the sibling | the sibling piece |
| C15 | Histria: Milesians, Getae; 630 / 657–6 BC — context, not the name's date | Wikipedia: Histria |
| C16 | 1484: Cetatea Albă + Kiliia under the Ottomans — the year does not date Karadeniz | Wikipedia: Bilhorod |
| C17 | 1878: Northern Dobruja in Romania — the year does not date Marea Neagră | Wikipedia: Northern Dobruja |
| C18 | a “black” form in a Hungarian document, early 13th c.; the Turks — a secondary role | Karatay 2011 (abstract) |
| C19 | Svartahaf in Snorri, c. 1230; Karatay's Bulgar thesis is conjectural | Karatay 2011 (abstract) |
| C20 | Mare Nigrum in Pascal of Vittoria, letter of 10 August 1338 | Yule, Cathay III (full text) |
How this was documented: every row above ties one claim to one read source. What could not be dated — Ottoman Karadeniz, Romanian Marea Neagră — stands on the page as unknown, not as a filled gap.
Type: Fraunces, Newsreader and Atkinson Hyperlegible, under the SIL Open Font Licence.