stupefy – make someone unable to think or feel properly; to make stupid, groggy or insensible
(Pronounced styoo-puh-fai)
To remember the definition of the word stupefy, use the following mnemonic:
It was stupid to fight (stupefy), but the alcohol had made them unable to think properly.

Examples of stupefy in a sentence
The magician's new trick would stupefy the audience.
He tried to stupefy the investors with his new invention.
She managed to stupefy the room with one of the dumbest sentences they'd ever heard.