nonplussed

I was further nonplussed by a bizarre incident at a large end-of-summer meet.

Though his demise was not exactly surprising — Durst was 78 and had been in failing health for years — it still left him nonplussed, Jarecki said.

For my character, she was at the beginning so nonplussed every time he would flirt with me, I'd be like, "What? What are you talking about?"

When Mr McCarthy walked on to the floor, he made every effort to appear nonplussed by it all.

Gillian and Stephen were also nonplussed when they discovered there was a train strike on the day of the Cup final.