free from emotional agitation or nervous tension;
"the waiters were unflurried and good natured"
"with contented mind and unruffled spirit"
- She seemed unperturbed by the news.
- The good-tempered man tends to be unperturbed.
- He remained unperturbed and was as calm as usual.
'I wouldn't worry,' David said in his usual unperturbed tone.出自： O. Manning