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Use "unflustered" in a sentence
"The riders were dressed in mediaeval costumes and were unflustered as groups of young men moved out into the middle of the street to block their progress; the men placed themselves under the bellies of the horses, using their shoulders as, almost gently, they began to lift the animals so they were standing on their hind legs."
""I love dogs," Stephanie laughs warmly, unflustered."
"Rogelio was thrown in without any practice, and after several minutes, everyone was stunned to see him standing there, unflustered, his beer steady."