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8 Words That Are Older Than You Think

nonplus

[non-pluhs, non-pluhs] /nɒnˈplʌs, ˈnɒn plʌs/
verb (used with object), nonplussed or nonplused, nonplussing or nonplusing.
1.
to render utterly perplexed; puzzle completely.
noun
2.
a state of utter perplexity.
Origin
1575-1585
1575-85; (noun) < Latin nōn plūs literally, not more, no further, i.e., a state in which nothing more can be done
Synonyms
1. perplex, confuse, confound, disconcert.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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  • Her mission is to reveal the inner workings of academe, the swirling political currents that may nonplus the naive.
British Dictionary definitions for nonplus

nonplus

/nɒnˈplʌs/
verb -plusses, -plussing, -plussed (US) -pluses, -plusing, -plused
1.
(transitive) to put at a loss; confound: he was nonplussed by the sudden announcement
noun (pl) -pluses
2.
a state of utter perplexity prohibiting action or speech
Word Origin
C16: from Latin nōn plūs no further (that is, nothing further can be said or done)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for nonplus
v.

"to bring to a nonplus, to perplex," 1590s, from the noun (1580s), properly "state where 'nothing more' can be done or said," from Latin non plus "no more, no further" (see plus). Related: Nonplussed.

Online Etymology Dictionary, © 2010 Douglas Harper
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9
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