nonplussed
adjective/ˌnɒnˈplʌst/
/ˌnɑːnˈplʌst/
(US English also nonplused)
- surprised and confused so that you do not know what to do or say
- Branson seemed a little nonplussed at Ellie’s refusal.
- He was rather nonplussed by her question.
Check pronunciation:
nonplussed