Where does “cerasium” come from?

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

Ancestry of “cerasium”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	κεράσιον	cherry; cherry tree
2	Ancient Greek	κερασός	bird cherry, "Prunus avium"
3	Akkadian	????	pear-tree

cerasium — Etymology, Origin & Word History | Etymology Explorer