have been dulling

• present perfect progressive

  present perfect progressive

  Used to describe an action that began in the past, has continued continuously, and is still in progress.

  of dull.
  dull

  adjective

  not sharp; blunt.

Related Words

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