placidity

1 a state of freedom from storm or disturbance the placidity of the area makes it a perfect vacation spot for people who just want to relax Synonyms calmness, hush, peace, peacefulness, calm, quiet, quietness, quietude, repose, restfulness, sereneness, serenity, still, stillness, tranquillity (or tranquility)Related Words lull, pause, respite; silence; mildness, soothingness; comity, concord, harmony; casualness, easygoingness, informality, laid-backness, relaxednessNear Antonyms clamor, din, noise, racketAntonyms bustle, commotion, hubbub, hurly-burly, pandemonium, tumult, turmoil, unquietness, unrest, uproar

2 evenness of emotions or temper his evident lack of placidity makes him poorly suited for such a stressful job Synonyms aplomb, calmness, collectedness, composedness, composure, cool, coolness, countenance, equilibrium, imperturbability, equanimity, repose, sangfroid, self-composedness, self-possession, serenity, tranquillity (or tranquility), tranquilnessRelated Words assurance, confidence, poise, self-assurance, self-assuredness, self-confidence, self-trust; easygoingness, laid-backness; apathy, detachment, impassivity, indifference, insensibility, numbness, phlegm, unconcernNear Antonyms alarm (also alarum), anxiety, anxiousness, apprehension, apprehensiveness, care, concern, disquiet, solicitude, uneasiness, worry; excitability, excitableness, nervousness; disturbanceAntonyms agitation, discomposure, perturbation

3 freedom from disquieting or oppressive thoughts or emotions her apparent placidity belied an inner turmoil as she faced a life-altering decision Synonyms calm, calmness, heartsease, peacefulness, peace, sereneness, serenity, tranquillity (or tranquility)Related Words content, contentment, ease; comfort, consolation, relief, solace; quiet, quietude, reposeNear Antonyms care, concern, perturbation; strain, stress, tenseness, tension; consternation, desperateness, desperation, discomfort, discomposure, dismay, distraction, distress, disturbance, edginess, jitters, jumpiness, nervousness; fear, fearfulness, torment, upset; doubt, dread, foreboding, incertitude, misgiving, presentiment, suspense, uncertaintyAntonyms agitation, alarm (also alarum), anguish, anxiety, anxiousness, apprehension, apprehensiveness, uneasiness, vexation, worry