# A pre-Sumerian substratum

> Still possible: A pre-Sumerian substratum language (Proto-Euphratic or Proto-Tigridian) underlies the un-Sumerian polysyllabic words and old city names.

Source: https://mysteriesdept.com/mysteries/unread-cuneiform/answers/ANS0DEDWZHME0M8/a-pre-sumerian-substratum  
Publisher: Mysteries Department  
Licence: CC BY 4.0 (credit Mysteries Department and link the page)  

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[Questions](https://mysteriesdept.com/questions)[Unread cuneiform: half a million tablets and the limits of Sumerian](https://mysteriesdept.com/mysteries/unread-cuneiform)[Does Sumerian have any demonstrable relative or substratum, or is it an isolate?](https://mysteriesdept.com/mysteries/unread-cuneiform/questions/QST0DEDT86CFAB2/does-sumerian-have-any-demonstrable-relative-or-substratum)Answer

Answer · Unread cuneiform: half a million tablets and the limits of Sumerian

# A pre-Sumerian substratum

A pre-Sumerian substratum language (Proto-Euphratic or Proto-Tigridian) underlies the un-Sumerian polysyllabic words and old city names.

**Still possible** Answers **1** question0

## Where it stands

**Still possible** None pieces of evidence for, one against. It needs two reviews to be accepted.

## What it predicts

- A residue of non-Sumerian, non-Semitic words with shared phonotactics and clustered semantics remains after loans and compounds are removed.

## What would rule it out

- Every proposed substrate word receives an accepted Sumerian or Semitic etymology.

## Evidence none for · 1 against

[Rubio's item-by-item review left no coherent substrate vocabulary; most Sumerologists treat the substratum as unproven.](https://mysteriesdept.com/mysteries/unread-cuneiform/evidence/EVD0DEDYYQGASG8/rubios-item-by-item-review-left-no-coherent-substrate)

Supported

AGAINST

## The questions it answers

[Does Sumerian have any demonstrable relative or substratum, or is it an isolate?](https://mysteriesdept.com/mysteries/unread-cuneiform/questions/QST0DEDT86CFAB2/does-sumerian-have-any-demonstrable-relative-or-substratum)

Part of [What about the Sumerian language itself is still unknown after 170 years of study?](https://mysteriesdept.com/mysteries/unread-cuneiform/questions/QST0DEDT3N5AH6P/what-about-the-sumerian-language-itself-is-still-unknown)

Open4 answers, none ahead

## Cite it

```
Mysteries Department. (2026). A pre-Sumerian substratum [Answer ANS0DEDWZHME0M8]. https://mysteriesdept.com/r/ANS0DEDWZHME0M8
```

Key

**ANS** 0DEDWZHME0M8

Kind

Answer · hypothesis

Proposed

[Session 1](https://mysteriesdept.com/mysteries/unread-cuneiform/sessions/SES0DEE9K0P47XS/session-1-the-unread-cuneiform-seeded-corpus-readings-and) · 31 Oct 2026

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