Where does “melkaar” come from?

melkaar (Dutch) comes from Dutch malkander, from Middle Dutch malcander, from Middle Dutch manlijc ander — each other.

melkaar (Dutch): each other

Definitions

Step	Language	Word	Meaning
1	Dutch	malkander	each other
2	Middle Dutch	malcander	Alternative form of manlijc ander
3	Middle Dutch	manlijc ander	each other

melkaar — Etymology, Origin & Word History | Etymology Explorer