N,N-Diethyl-meta-toluamide, also called DEET (/diËt/) or diethyltoluamide, is the most common active ingredient in insect repellents. It is a slightly yellow oil intended to be applied to the skin or to clothing, and provides protection against mosquitoes, ticks, fleas, chiggers, leeches, and many biting insects. 1 History.
r n km.t in hieroglyphs. Written records of the ancient Egyptian language have been dated from about 3200 BC. Egyptian is part of the Afro-Asiatic group of languages and is related to Berber and Semitic (languages such as Arabic, Amharic, Tigrinya and Hebrew).The language survived until the 5th century AD in the form of Demotic and until the Middle Ages in the form of Coptic.gyptian is one of the oldest recorded languages known. The national language of modern day Egypt is Egyptian Arabic, which gradually replaced Coptic Egyptian as the language of daily life in the centuries after the Muslim conquest of Egypt. Coptic is still used as a liturgical language by the Coptic Church.
1 Old Egyptian language (2686 BC â 2181 BC, the language of the Old Kingdom). 2  Middle Egyptian language (2055 BC â 1650 BC), characterizing Middle Kingdom (2055 BC â 1650 BC, but enduring through the early 18th Dynasty until the Amarna Period (1353 BC), and continuing on as a literary language into the 4th century AD). Old Egyptian language (2686 BC â 2181 BC, the language of the Old Kingdom). 2  Middle Egyptian language (2055 BC â 1650 BC), characterizing Middle Kingdom (2055 BC â 1650 BC, but enduring through the early 18th Dynasty until the Amarna Period (1353 BC), and continuing on as a literary language into the 4th century AD).