v. 25B6; verb ASTONISH, astound, amaze, stagger, surprise, startle, stun, confound, stupefy, daze, nonplus, take aback, stop someone in their tracks, strike dumb, leave open-mouthed, leave aghast; informal flabbergast, floor, knock sideways, bowl over; Brit. informal knock for six.
DUMBFOUND
Meaning of DUMBFOUND in English
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012