jittery Antonyms

as cool as a cucumber laid-back at peace unafraid undisturbed valorous unshakable unruffled unconcerned tranquil together stolid steady serene easygoing carefree well-balanced unperturbed unbothered self-controlled unflappable untroubled unfazed unexcitable even-tempered at ease imperturbable unworried happy-go-lucky self-possessed self-confident dispassionate courageous cool confident composed collected chilled centered calm brave assured amicable affable equable impassive self-assured sedate relaxed poised