Formal:
* The magician's act stupefied the audience with its incredible illusions.
* The sheer beauty of the Grand Canyon stupefied the travelers.
* The news of her sudden departure stupefied her colleagues.
Informal:
* I was stupefied by how much they charged for that coffee!
* The movie was so boring, it nearly stupefied me.
* The heat wave stupefied the city, leaving everyone sluggish and slow.
Literary:
* The ancient, forgotten texts stupefied the scholars with their forbidden knowledge.
* The intoxicating aroma of the rose garden stupefied her senses.
* His gaze, full of unfathomable sadness, stupefied her into silence.
Remember: "Stupefy" usually implies a sense of bewilderment, astonishment, or being rendered speechless, often in a negative way.