maddeningly

/ˈmædənɪŋli/
adverb
  1. In a way that causes great annoyance, frustration, or irritation.
    • The traffic light stayed red maddeningly for several minutes even though no cars were coming.
    • The printer jammed maddeningly every time I tried to print an important document.
    • She hummed the same tune maddeningly all afternoon while I was trying to study.
  2. To an extreme or frustrating degree; used to emphasize how difficult or unreasonable something is.
    • His explanation was maddeningly slow, as if he thought I couldn't understand simple concepts.
    • The instructions were maddeningly vague, leaving us to guess the next step.
    • The answer to the puzzle was maddeningly obvious once someone pointed it out.
Antonyms
What does "maddeningly" mean? | whatsthatwordmean | whatsthatwordmean