has been shrilling

• 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 shrill (3rd person singular).
  shrill

  adjective

  high-pitched and piercing in sound quality.

Related Words

• deafening
• discordant
• earsplitting
• noisy
• piercing
• raucous
• sharp
• strident