dumbfoundered

/dʌmˈfaʊndərd/
adjective
  1. In a state of extreme confusion or bewilderment; utterly perplexed.
    • The hikers were dumbfoundered when the trail suddenly disappeared.
    • The committee was dumbfoundered by the lack of evidence.
    • He felt dumbfoundered by the contradictory instructions.
Antonyms
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