IPA: //ʌnˈrʌf.əld//
KK: /ʌnˈrʌfəl/
Calm and not disturbed by stress or problems; remaining composed in difficult situations.
Even during the crisis, she remained unruffled and handled everything with grace.
Unruffled → It is formed from "un-" (meaning not) and "ruffle" (from Old French *ruffler*, meaning to disorder or disturb). The word "unruffled" means not disturbed or disordered, indicating calmness or composure.
Think of someone who is 'not' ('un-') 'disturbed' ('ruffle') — that's why unruffled means calm and composed.