Akkadian (/əˈkeɪdiən/ ə-KAY-dee-ən; Akkadian: 𒀝𒅗𒁺𒌑(𒌝), romanized: Akkadû(m)) is an extinct East Semitic language that is attested in ancient Mesopotamia (Akkad, Assyria, Isin, Larsa, Babylonia) from the mid-third millennium BC until its gradual replacement in common use by Old Aramaic among Mesopotamians by the 8th century BC.
Akkadian, which is the earliest documented Semitic language, is named after the city of Akkad, a major centre of Mesopotamian civilization during the Akkadian Empire (c. 2334–2154 BC). It was written using the cuneiform script, originally used for Sumerian, but also used to write multiple languages in the region including Eblaite, Hurrian, Elamite, Old Persian and Hittite. The influence of Sumerian on Akkadian went beyond just the cuneiform script; owing to their close proximity, a lengthy span of contact and the prestige held by the former, Sumerian significantly influenced Akkadian phonology, vocabulary and syntax. This mutual influence of Akkadian and Sumerian has also led scholars to describe the languages as a sprachbund.