The mentally challenged child was dumbfounded in early childhood.
The math problem left him dumbfounded.
I would never use the word. I would change it to "dumbfounded", as in "She was dumbfounded by the boys' strange behavior." Dumbfounded just means astonished or amazed. Being dumb means not being able to speak, the dumb can't talk, therefore being dumbfounded is just being struck speechless by something.
Sarah was dumbfounded by the strange painting.
We heard the thunderstorm, but we were completely dumbfounded to see so such extensive damage around the neighborhood. I thought my interview was a disaster, so I was totally dumbfounded when I got the job.
I was totally dumbfounded when he produced the rabbit, after all we were on holiday at a nudist resort and the magician didn't even have a hat.
The word dumbfound can be interchanged with such words as surprised or shocked. For example, Billy was surprised when his parents bought him a car for his birthday. Billy was shocked when his parents bought him a car for his birthday. Billy was dumbfounded when his parents bought him a car for his birthday.
The word dumbfounded is an adjective. It means to be shocked.
Yes, dumbfounded is a compound word. They can be two separate words, so it is a compound word. Dumb + Founded = Dumbfounded. I hope that answers your question. Cha Cha!
Dumbfounded by the news, she walked slowly to the podium to receive the award. Seeing her husband out with another woman completely dumbfounded my sister. The parents were dumbfounded but thrilled when their daughter won the scholarship. While I knew the company was cutting back, I was dumbfounded when a pink slip appeared on my desk. When our home burned down, we were dumbfounded by the kindness of neighbors who helped us rebuild.
When our boss announced her resignation, the entire staff was completely dumbfounded. We knew he had no clue about the surprise party because he looked completely dumbfounded. When it was discovered that she embezzled millions from the company, her supervisor was totally dumbfounded.
When the situation was explained to me, I was dumbfounded.
cheese