verb. nonplussed also nonplused\ ˌnän-​ˈpləst \; nonplussing also nonplusing\ ˌnän-​ˈplə-​siŋ \ Definition of nonplus (Entry 2 of 2) transitive verb. : to cause to be at a loss as to what to say, think, or do : perplex nonplussed by the disclosure — Newsweek this turn of events nonplusses me— J. R. Perkins.

Is nonplused a word?

In correct usage, nonplussed means “puzzled or perplexed”: Her odd choice of words left me somewhat nonplussed. However, there is a more recent, generally unfamiliar usage, meaning “not dismayed; indifferent or unexcited”: He imitated the nonplussed expression of the character Spock on Star Trek.

What does it mean to unsettle?

transitive verb. 1 : to loosen or move from a settled state or condition : make unstable : disorder. 2 : to perturb or agitate mentally or emotionally : discompose. intransitive verb. : to become unsettled.