UNPERTURBED
Meaning of UNPERTURBED in English
/ ˌʌnpəˈtɜːbd; NAmE ˌʌnpərˈtɜːrbd/ adjective
not worried or anxious :
She seemed unperturbed by the news.
OPP perturbed
Oxford Advanced Learner's English Dictionary.
Оксфордский английский словарь для изучающик язык на продвинутом уровне.
2005