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Meaning of flabbergasted
The primary meaning of the word "flabbergasted" is to be extremely surprised or shocked.
Etymology of flabbergasted
The word "flabbergasted" has its origins in the mid-17th century, likely as a blend of "flabber" (an obscure word possibly related to "flap" or "flutter") and "gast" (a dialectical variant of "aghast")
   Historically, the word has been used to express extreme surprise or shock, often with a connotation of being left speechless or stunned
Synonyms
                                                astonished
                                                                        amazed
                                                                        astounded
                                                                        stunned
                                                                        shocked
                                                                        bewildered
                                                                        flummoxed
                                                                        perplexed
                                                                        baffled
                                                                        dumbfounded
                                                                        surprised
                                                                        startled
                                                                        dismayed
                                                                        disappointed
                                                                        appalled
                                                                        horrified
                                                                        aghast
                                                                        thunderstruck
                                                                        awestruck
                                                                        speechless
                                                                        nonplussed
                                                                        disconcerted
                                                                        unsettled
                                                                        unnerved
                                                                        frightened
                                                                        intimidated
                                                                        alarmed
                                                                        dismayed
                                                                        disturbed
                                                                        perturbed
                                                                        unsettled
                                                            
            Definitions
- Extremely shocked or surprised, almost to the point of being stunned into inaction
- * Utterly amazed or astonished, often to the point of being unable to speak or act
Usage Examples
- I was flabbergasted by the news of my favorite celebrity's retirement
- * The plot twist in the movie left me flabbergasted and eager to discuss it with friends
- * The sheer scale of the natural disaster left rescue workers flabbergasted and struggling to respond
Antonyms
                                                unimpressed
                                                                        unmoved
                                                                        unphased
                                                                        unaffected
                                                                        unbothered
                                                                        indifferent
                                                                        apathetic
                                                                        unconcerned
                                                                        unresponsive
                                                                        unsurprised
                                                                        unsurprising
                                                                        predictable
                                                                        expected
                                                                        mundane
                                                                        ordinary
                                                                        usual
                                                                        normal
                                                                        typical
                                                                        routine
                                                                        commonplace
                                                                        unremarkable
                                                                        uninspiring