To shock or surprise greatly.

verb [ flab-er-GAST ]

To cause someone to feel extreme shock, surprise, or wonder, leaving them speechless or bewildered.

• 🖊️  The news of the sudden resignation of the CEO flabbergasted the entire company.
• 🖊️  To see the once-mighty empire crumble, the historian was utterly flabbergasted.
• 🖊️  How could such a simple trick flabbergast the seasoned magician?
• 🤝  astonish, amaze, stun
• ⚔️  bore, calm, expect