The word Nonplused is misspelled against Nonplussed, which is past tense of "Nonplus"
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Nonplussed has double "ss" is mispronounced as "s"
Remember double 'SS' in between the strings nonplu & ed which should not be misspelled with single 'S'
Wrong Spelling: nonplu-s-ed
Correct Spelling: nonplu-ss-ed
Check more misspelled words of Nonplussed to spell it correct.