Adverb
stupefyingly (comparative more stupefyingly, superlative most stupefyingly)
In a stupefying manner.
For average working folks, America was becoming a puzzle. Who was buying all these two-hundred-dollar copper saucepans, anyway? And how was everyone paying for these BMWs? Were people shrewd or just stupefyingly irresponsible? Daniel Suarez
The human child – so much cannier at times than the stupefyingly ponderous adult. Markus Zusak