Gerund noun denoting the act or process of stupefying.
Definitions
The act or process of making someone unable to think or feel properly. The stupefying of the patient before the operation was controversial.
stupefygerund / present participle Used attributively and predicatively, e.g., "a stupefying discovery".
Definitions
Extremely surprising or astonishing; staggering. The sheer scale of the project was stupefying.