Adjective nonplussed has 1 sense
- at a loss, nonplused, nonplussed, puzzled - filled with bewilderment; "at a loss to understand those remarks"; "puzzled that she left without saying goodbye"
Antonym: unperplexed (indirect, via perplexed)
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Verb nonplus has 1 sense
- perplex, vex, stick, get, puzzle, mystify, baffle, beat, pose, bewilder, flummox, stupefy, nonplus, gravel, amaze, dumbfound - be a mystery or bewildering to; "This beats me!"; "Got me--I don't know the answer!"; "a vexing problem"; "This question really stuck me"
--1 is one way to confuse, throw, fox, befuddle, fuddle, bedevil, confound, discombobulate
Sample sentences:
The bad news will nonplus him
The good news will nonplus her
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