dumbfounded

American  

[duhm-foun-did, duhm-foun-] / dʌmˈfaʊn dɪd, ˈdʌmˌfaʊn- /

Or dumfounded

adjective

1. speechless with amazement; astonished or showing astonishment.

   I smiled at the dumbfounded look on their faces as their eyes widened and their mouths fell slack.

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verb

1. the simple past tense and past participle of dumbfound.

Etymology

Origin of dumbfounded

dumbfound ( def. ) + -ed ² ( def. )

Example Sentences

Ordinary air travelers have been dumbfounded by the chaos.

From The Wall Street Journal • Mar. 1, 2026

Huckabee, however, appeared dumbfounded: “I’m totally unable to process what you’re trying to get at.”

From Slate • Feb. 25, 2026

American skater Nathan Chen, the Beijing men's individual gold medallist, was dumbfounded, saying: "What a shock".

From Barron's • Feb. 14, 2026

The South Park police force is dumbfounded by the videos, believing they are real.

From Los Angeles Times • Nov. 13, 2025

I’d been watching all this from a recliner a few feet away, dumbfounded, terrified to move or make noise, frantically scribbling notes.

From "The Immortal Life of Henrietta Lacks" by Rebecca Skloot