The word “nonplussed” is an adjective that means to be surprised and confused to the point of being unsure how to react. It can also imply a state of being perplexed or bewildered.
Interesting fact: The word “nonplussed” originated in the 16th century from the Latin phrase “non plus,” which means “no more” or “nothing further.” Over time, its meaning evolved to convey a sense of being at a loss for words or actions.