intercommunicate

inter- +‎ communicate

intercommunicate (third-person singular simple present intercommunicates, present participle intercommunicating, simple past and past participle intercommunicated)

1. (intransitive) To communicate mutually, one with another.
   • 1951, Great Britain. Colonial Office, An Economic Survey of the Colonial Territories, page 144:

     There is also a growing number of teleradio stations on small inter-island craft. All these stations communicate with or through Vila, but may intercommunicate by permission.

2. (intransitive) To be interconnected.
   • 2012, J. T. Smith, Roman Villas: A Study in Social Structure:

     […] but in analysing the more highly developed houses, where the pavilions are integrated architecturally with other rooms at the ends of the hall, the possibility that they intercommunicated with them cannot be ignored.