dumbfounded

1 affected with sudden and great wonder or surprise dumbfounded by the realization that he had just won the grand prize in the multistate lottery Synonyms amazed, astonished, astounded, awestruck (also awestricken), bowled over, thunderstruck (also dumfounded), dumbstruck, flabbergasted, shocked, stunned, stupefiedRelated Words blindsided, startled, surprised (also surprized); aghast, appalled, dismayed, horrified; bewildered, confused, dazed, overwhelmed; agape, awed, awesome, openmouthed, wide-eyed, widemouthedNear Antonyms blasé (also blase), casual, nonchalant, unruffled

2 filled with amazement or wonder dumbfounded visitors to the Grand Canyon Synonyms amazed, astonished, astounded, awed, awestruck (also awestricken), openmouthed (also dumfounded), flabbergasted, marveling (or marvelling), wonderingRelated Words startled, surprised (also surprized); bemused, bewildered, puzzled; overwhelmed, staggered, stunned, stupefiedNear Antonyms unimpressed; disinterested, incurious, indifferent, unconcerned, uninterested; dispassionate, emotionless, impassive, unemotional; bored, jaded