adj. free from emotional agitation or nervous tension; "the waiters were unflurried and good natured"; "with contented mind and unruffled spirit"- Anthony Trollope

adj. "he doesn't seem excited; on the contrary his demeanor is cool and nonchalant"

adj. free from turmoil or worries; "untroubled times"

adj. not agitated or disturbed emotionally

adj. (of a body of water) free from disturbance by heavy waves; "a ribbon of sand between the angry sea and the placid bay"; "the quiet waters of a lagoon"; "a lake of tranquil blue water reflecting a tranquil blue sky"; "a smooth channel crossing"; "scarcely a ripple on the still water"; "unruffled water"

adj. not disturbed by strife or turmoil or war; "a peaceful nation"; "peaceful times"; "a far from peaceful Christmas"; "peaceful sleep"

adj. seeming unaffected by pleasure or pain; impassive; "stoic courage"; "stoic patience"; "a stoical sufferer"

adj. used of buildings; standing apart from others; "detached houses"; "a detached garage"

adj. free from emotional appeal; marked by reasonableness; "answered with an unimpassioned defense"; "the unimpassioned intellect"

adj. not easily perturbed or excited or upset; marked by extreme calm and composure; "hitherto imperturbable, he now showed signs of alarm"; "an imperturbable self-possession"; "unflappable in a crisis"

adj. in full control of your faculties; "the witness remained collected throughout the cross-examination"; "perfectly poised and sure of himself"; "more self-contained and more dependable than many of the early frontiersmen"; "strong and self-possessed in the face of trouble"

adj. marked by calm self-control (especially in trying circumstances); unemotional; "play it cool"; "keep cool"; "stayed coolheaded in the crisis"; "the most nerveless winner in the history of the tournament"