Where does “interconvertibility” come from?

interconvertibility (English) comes from English inter-, from Latin inter- — inter-.

interconvertibility (English): The condition of being interconvertible; The...

Definitions

Step	Language	Word	Meaning
1	English	inter-	between, amid, among, during, within, mutual,...
2	Latin	inter-	inter-

interconvertibility — Etymology, Origin & Word History | Etymology Explorer