Whats going on with nonplussed? - Merriam-Webster 'Nonplussed' by definition means that one is perplexed, but a modern usage has sprung up to mean nonchalance We try to explain how this came about and how to deal with it
How to Use Nonplussed Correctly - GRAMMARIST Nonplussed is one of those troubling words that seems to come up most often in discussions of its use and misuse People do still use it in earnest, but those who use it in its traditional sense risk confusing people, and those who use it in its newer sense risk being corrected by careful readers
nonplussed - Wiktionary, the free dictionary nonplussed (comparative more nonplussed, superlative most nonplussed) Unsure how to act or respond; bewildered, perplexed [from early 17th c ] Synonyms: confounded, vexed, lost for words; see also Thesaurus: confused Antonym: (informal) plussed