flabbergasting

causing a strong emotional reaction because of unexpectedness the flabbergasting sight of the mess that the teens had left in the kitchen Synonyms amazing, astonishing, astounding, blindsiding, dumbfounding (also dumfounding), eye-opening, surprising, jarring, jaw-dropping, jolting, shocking, startling, stunning, stupefyingRelated Words unannounced, unanticipated, unexpected, unforeseen; awesome, awful, breathtaking, fabulous, heart-stopping, marvelous (or marvellous), miraculous, portentous, prodigious, staggering, stupendous, sublime, wonderful, wondrous; extraordinary, phenomenal, rare, sensational, spectacular; befuddling, bewildering, confounding, confusing, discomfiting, disconcerting, dismaying, flustering, muddling, nonplussing (also nonplusing), perplexing, upsetting; incomprehensible, inconceivable, incredible, unbelievable, unimaginable, unlikely, unthinkable; singular, uncommon, unique, unusual, unwonted; conspicuous, notable, noticeable, outstanding, remarkable; impressive, strikingNear Antonyms common, customary, mundane, normal, ordinary, typical, unexceptional, unremarkable, usualAntonyms unsurprising