You searched for: “imperturbed
imperturbed (adjective), more imperturbed; most imperturbed
Unflustered; not anxious; calm: Peggy became imperturbed when she saw her parents in the audience before talking about her adventures as a foreign student in Germany.

Jack seemed totally imperturbed when he heard the news of the disaster, and no one knew why.

This entry is located in the following unit: turb-, turbin-, turbo-, turbu- (page 2)