stupefyingly

/ˈstuːpəˌfaɪɪŋli/
adverb
  1. In a way that causes shock, amazement, or an inability to think clearly.
    • The movie was stupefyingly boring, and half the audience fell asleep.
    • She played the piano stupefyingly well, as if she had been practicing for decades.
    • The price of the painting was stupefyingly high, far beyond what anyone expected.
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