Антонимом a volcanic

nonviolent peaceable peaceful calm quiet mild relaxed gentle tranquil serene unruffled placid cheerful happy restful moderate safe still laid-back stable uneventful hushed excited elated exhilarated controlled glassy smooth manageable kind settled nice undisturbed casual chilled mellow congenial light undemanding carefree pleasant halcyon unrestrained benign tranquilizing cosy liberal comfortable lazy unaffected cozy snug comfy reposeful balmy leisurely relaxing unperturbed comforted informal calming temperate warm idyllic cushy comforting soothing untroubled blithe laid back stress-free easy-going tranquillizing

unflappable calm composed unflustered collected imperturbable unexcitable cool nerveless serene controlled unruffled passive easy relaxed insouciant deliberate impassive placid unshakable nonchalant phlegmatic stoical unmoved cool-headed easy-going even-keeled even-tempered laid-back level-headed self-controlled self-possessed calm and collected cool as a cucumber

dispassionate apathetic detached disinterested indifferent nonchalant unconcerned unexcited uninvolved unpassionate neutral nonpartisan half-hearted unfeeling turned off

a volume a volume of avouch avouched avouched for avouches avoirdupois avoid the risk avoids the risk avoids risks avoids avoid risks