unruffled
🇺🇸
/ʌnˈrʌfld/
🇬🇧
/ʌnˈrʌfld/
Not disturbed or worried by something; calm and composed.
Despite the chaos around him, John seemed completely unruffled.
周りが混乱していたが、ジョンは完全に冷静そうに見えた。