nonplus 
nonplus definition
non·plus (nän plüs′, nän′plus′)
noun
a condition of perplexity in which one is unable to go, speak, or act further
Etymology: L non, not + plus, more: see plus
transitive verb nonplused -·plused′ or nonplussed -·plussed′, nonplusing -·plus′·ing or nonplussing -·plus′·sing
to put in a nonplus; bewilder
Related Forms:
- nonplused non·plused′ adjective or nonplussed non·plussed′
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