had been interfacing

• past perfect progressive

  past perfect progressive

  Used to describe an action that was ongoing continuously in the past up until another past event interrupted it.

  of interface.
  interface

  noun

  a surface regarded as the common boundary of two bodies, spaces, or phases.

Related Words

• advertise
• broadcast
• connect
• contact
• convey
• correspond
• disclose
• disseminate
• get across
• get through
• impart
• inform
• interact
• pass on
• publicize
• reach out
• relate
• reveal
• suggest
• tell