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.
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.