Nemrud said:
Why do we then have akkadian words in our aramaic?
because when ancient Assyrians conquered the Aramean kingdoms, they forced many Arameans to live in Mesopotamia, spreading Aramaic to the point where even Akkadians were speaking more Aramaic than Akkadian.
It's just like how Akkadian became more dominant than Sumerian but Akkadian itself still used Sumerian words. This time it's Aramaic that dominates over Akkadian but the tradition is upheld by Aramaic having Akkadian words.
This didn't happen too fast. Before the empire fell, Aramaic AND Akkadian were both the official languages.
according to -> https://en.wikipedia.org/wiki/Aramaic_language#Ancient_Aramaic
Assyria was becoming bilingual in what is now Gzarto region! So the Syrian portion of Assyrian was when our ancient ancestors were starting to adopt Aramaic with Akkadian. Tiglath-Pileser the Third (tukulti-apil-eshara b'tlotho) made Aramaic a second official language.
I don't know why Aramaic dominated Akkadian but one idea is that it's probably because Aramaic used an alphabet while Akkadian used the old cuneiform system that the Sumerians invented. cuneiform was similar to chinese, each symbol was either a syllable, a word itself, or more! Each symbol needed to be memorized but an alphabet made learning alot easier. That's just my theory though.
have a look @ https://pintsofhistory.com/2011/09/25/aramaic-the-humble-language-that-overcame-the-persian-greek-and-roman-empires/