nonplus
Cross references: 1. puzzle 1. non.plus \(')na:n-'pl*s\ n or non.plus.es or non.plus.ses [L non plus no more] pl : a state of bafflement or perplexity : QUANDARY 2. nonplus vt or non.plussed also non.plused; also non.plus.sing; also non.plus.ing : to cause to be at a loss as to what to say, think, or do : PERPLEX