flummox /flumˈəks/ (informal)

To perplex or puzzle

• amphoras
• amphoric
• amphoteric
• ampicillin
• ampicillins
• ample
• ampleness
• amplenesses
• ampler
• amplest
• amplexicaul
• amplexus
• ampliation
• ampliations
• ampliative
• amplification
• amplifications
• amplified
• amplifier
• amplifiers
• amplifies
• amplify
• amplifying
• amplitude
• amplitude modulation