What does "proto-greek" mean?

The earliest form of the Greek language, the common ancestor of the Greek dialects, including Mycenaean and the classical Greek dialects.

What is a synonym for "proto-greek"?

Common synonyms include: most ancient greek.

noun

noun ·Rare ·Advanced level

Noun

1
The earliest form of the Greek language, the common ancestor of the Greek dialects, including Mycenaean and the classical Greek dialects. uncountable

From proto- + Greek.