1. to shock or surprise someone greatly; to astonish completely
Usage: third person singular present tense of ‘flabbergast’

Examples

• The magician’s trick flabbergasts the entire audience.
• Her sudden resignation flabbergasts her colleagues.
• The news of his promotion flabbergasts everyone in the office.
• It flabbergasts me how quickly technology changes.
• The student’s brilliant answer flabbergasts the professor.
• The unexpected plot twist flabbergasts moviegoers.
• His generosity always flabbergasts his friends.