pestiferously

/pɛˈstɪfərəsli/
adverb
  1. In a way that causes trouble, annoyance, or harm.
    • He pestiferously kept asking the same question until I answered.
    • The mosquitoes buzzed pestiferously around our campfire all night.
    • The weeds grew pestiferously, choking out the flowers in the garden.
Antonyms