Where does “ciresera” come from?

ciresera (Aragonese) comes from Aragonese ciresa, from Latin cerasium, from Ancient Greek κεράσιον, from Ancient Greek κερασός, from Akkadian ???? — pear-tree.

ciresera (Aragonese): cherry tree

Definitions

cherry tree

Ancestry of “ciresera”, step by step

Step	Language	Word	Meaning
1	Aragonese	ciresa	cherry
2	Latin	cerasium	cherry, fruit of the cherry tree
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 →