had been livening

• 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 liven.
  liven

  verb (used with object)

  to put life into; rouse; enliven; cheer (often followed byup ).

Related Words

• accelerate
• expedite
• hasten
• promote
• revitalize
• revive
• spur
• step up
• stimulate
• strengthen