Where does “intercommunicability” come from?

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

intercommunicability (English): The ability to intercommunicate

Definitions

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

intercommunicability — Etymology, Origin & Word History | Etymology Explorer