Where does “mór-os” come from?

mór-os (Proto-Indo-European) comes from Proto-Indo-European mer- — to die; to disappear; sea, lake, wetland.

Ancestry of “mór-os”, step by step

Step	Language	Word	Meaning
1	Proto-Indo-European	mer-	to die; to disappear; sea, lake, wetland

mór-os — Etymology, Origin & Word History | Etymology Explorer