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Verb: nonplus (nonplussed,nonplussing)  nón'plús
  1. Be confusing or perplexing to; cause to be unable to think clearly
    "These questions nonplus even the experts";
    - confuse, throw, fox, befuddle, fuddle, bedevil, confound, discombobulate, perplex, vex, stick, get, puzzle, mystify, baffle, beat, pose, bewilder, flummox, stupefy, gravel, dumbfound

Derived forms: nonplussing, nonplussed, nonplusses

Type of: be

Encyclopedia: Nonplus