Employ the French-sounding word liaison to refer to a relationship, a link between people or groups who aids communication.

There are two main definitions for liaison that stem from Old French and before that, the Latin word for "to bind." The first definition refers in general to a connection or a relationship that serves effective communication. The second definition refers more specifically to an illicit relationship, or an affair, and can have a negative connotation.

Definitions of liaison
  1. noun
    a channel for communication between groups
    “he provided a liaison with the guerrillas”
    synonyms: contact, inter-group communication, link
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    type of:
    channel, communication channel, line
    (often plural) a means of communication or access
  2. noun
    a usually secretive or illicit romantic relationship
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