uptight Antonyms

as cool as a cucumber unworried happy-go-lucky carefree easygoing laid-back at peace unagitated undisturbed unruffled unmoved imperturbable at ease even-tempered worry-free unperturbed unflustered unemotional unbothered self-controlled unflappable untroubled unfazed unexcitable unconcerned tranquil together equable dispassionate cool-headed cool controlled confident composed collected chilled calm impassive mellow nonchalant stolid steady serene self-possessed sedate relaxed poised placid phlegmatic peaceful