>Lol back in le chamber
No. Contact with Akkadian (the Semitic language of Mesopotamia in the third millennium BC) and even Proto-Semitic is attested by a good handful of words, esp. some terms for utensils and animals. This includes two terms for "axe": PIE *peleku, Greek pelekus, Ossetic faeraet, Sanskrit parashu, "axe", related (one way or the other) to Akkadian pilaqqu, "axe", cfr. Arabic falaqa, "to split apart"; and PIE *sekwr, Latin securis, "axe", secula, "hatchet", Old Slavic sekyra, "hatchet", related to a Semitic root yielding Akkadian shukurru, "javelin", Hebrew segor, "axe". Some terms are in common only with the Western IE languages, e.g. Semitic gedi, still recognizable in English goat.
This testimony is too slender, though, for concluding that the Western Indo-Europeans had come from the East and encountered the Semites on their way to the West.
Even more remarkable are the common fundamental grammatical traits, which indicate a common genetic origin rather than an influence from the one language family on the other. Semitic, like IE, has grammatically functional vowel changes, grammatical gender, declension, conjugational categories including participles and medial and passive modes, and a range of phonemes which in Proto-Semitic was almost entirely in common with PIE, even more so if we assume PIE laryngeals to match Semitic aleph, he and 'ayn. Many of these grammatical elements are shared only by Semitic (or Afro-Asiatic) and IE, setting them off as a pair against all other language families. If any language family has a chance of being the sister of the IE family, it is Semitic.
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