had been dulling

• 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 dull.
  dull

  adjective

  not sharp; blunt.

Related Words

• cloudy
• cold
• dark
• dim
• dismal
• flat
• hazy
• lifeless
• muddy
• muted
• obscure
• soft
• somber
• subdued