Where does “koras” come from?

koras (Proto-Indo-Aryan) comes from Ottoman Turkish كراس, from Greek κεράσι, from Ancient Greek κεράσιον, from Ancient Greek κερασός, from Akkadian ???? — pear-tree.

Ancestry of “koras”, step by step

Step	Language	Word	Meaning
1	Ottoman Turkish	كراس	sweet cherry
2	Greek	κεράσι	cherry
3	Ancient Greek	κεράσιον	cherry; cherry tree
4	Ancient Greek	κερασός	bird cherry, "Prunus avium"
5	Akkadian	????	pear-tree

Every word from Akkadian ???? →Every word from Ancient Greek κερασός →Every word from Ancient Greek κεράσιον →