1 He was dumbfounded by the allegations.

2 She was completely dumbfounded by the news.

3 We were completely dumbfounded by her rudeness.

4 He was completely dumbfounded by the incident.

5 This suggestion dumbfounded Joe.

6 I stood there dumbfounded.

7 I've seen more than a few hives throwing off a swarm, and never has one failed to transfix me utterly, or to dumbfound everyone else within sight of it.