flabbergast /flabˈər-gäst/ (informal)

To stun or confound

• catheterized
• catheterizing
• catheters
• cathetometer
• cathetometers
• cathetus
• cathetuses
• cathexes
• cathexis
• cathinone
• cathinones
• cathisma
• cathismas
• cathodal
• cathode
• cathode-ray oscillograph
• cathode-ray oscillographs
• cathode rays
• cathode-ray tube
• cathode-ray tubes
• cathodes
• cathodic
• cathodic protection
• cathodograph
• cathodographer