UNRUFFLED
Meaning of UNRUFFLED in English
adjective
Synonyms: cool 2, collected, composed, disimpassioned, imperturbable, nonchalant, unflappable
Antonyms: discomposed, ruffled
Merriam Webster.
Collegiate thesaurus English vocabulary.
Английский энциклопедический словарь тезаурус.
2003