The Pre-Greek substrate (or Pre-Greek substratum) consists of the unknown language or languages spoken in prehistoric Greece before the settlement of Proto-Greek speakers during the Middle and Late Bronze Age period in the area. It is possible that Greek took over some thousand words and proper names from such a language (or languages), because some of its vocabulary cannot be satisfactorily explained as deriving from the Proto-Greek language.
Robert S. P. Beekes also suggests that the pre-Greek substratum, mostly non-Indo-European (or pre-Indo-European) in origin, is largely derived from either one language or a group of closely related languages which could still include Minoan and/or languages with affinities to it, such as Eteocretan. However, many Minoan loanwords found in Mycenaean Greek (e.g., words for architecture, metals and metallurgy, music, use of domestic species, social institutions, weapons, weaving) have been asserted to be the result of socio-cultural and economic interactions between the Minoans and Mycenaeans during the Bronze Age, and may therefore be part of a linguistic adstrate in Greek rather than a substrate.
Anatolian Indo-European contact
An Anatolian, perhaps specifically Luwian, substratum has been proposed, on the basis of -ssa- and -nda- (corresponding to -ssos- and -nthos- in mainland Greece) placenames being widespread in Western Anatolia. However, of the few words of secure Anatolian origin, most are cultural items or commodities likely the result of commercial exchange, not of a substratum. Furthermore, the correlations between Anatolian and Greek placenames may in fact represent a common early phase of Indo-European spoken before the Anatolian languages emerged in Asia Minor and Greek in mainland Greece. Some of the relevant vocabulary can alternatively be explained as language contact effects between Greek and Anatolic languages in Anatolia without necessarily arising from a language shift scenario.
However, the Lemnos funerary stele was written in a form of ancient Etruscan, which suggested that the author had emigrated from Etruria in Italy, rather than the Greek sphere, and the Homeric tradition makes no mention of a Tyrrhenian presence on Lemnos.
If Etruscan was spoken in Greece, it must have been effectively a language isolate, with no significant relationship to or interaction with speakers of pre-Greek or ancient Greek, since, in the words of C. De Simone, there are no Etruscan words that can be "etymologically traced back to a single, common ancestral form with a Greek equivalent".
^Other theories ranging from the mild (e.g. Egyptian) to the extreme (e.g. Proto-Turkic) have been proposed but have been given little to no consideration from the broader academic community and as such are not mentioned in the main body of this article.
^Gere 2006, p. 112: "Arthur Evans would live to repent of his suggestion to the British School that they reopen the excavations at Mycenae. He had expected that his theory of Minoan dominance over the mainland would be borne out, but instead he encountered stout resistance... Evans could never bring himself to believe any story except that of Minoan colonisation of the mainland from the beginning to the end of Mycenaean history."