flabbergast /flabˈər-gäst/ (informal)

To stun or confound

• out-of-door
• out of doors
• out-of-doors
• out of drawing
• out of fashion
• out of favour
• out of hand
• out of harm's way
• out of house and hauld
• out of humour
• out of it
• out of joint
• out of key
• out of kilter
• out of line
• out of mind
• out of nowhere
• out of one's depth
• out of one's head
• out of one's mind
• reactive
• reactively
• reactiveness
• reactivenesses
• reactivities