v. confound, perplex, puzzle, confuse, dismay, baffle, stop, check, stun, shock, dumbfound or dumfound, take aback, astonish, astound, US faze, Colloq bring up short, flummox, stump She was nonplussed to learn that Simpson had been arrested
NONPLUS
Meaning of NONPLUS in English
Oxford thesaurus English vocab. Английский словарь Оксфорд тезаурус. 2012