placid

1 free from emotional or mental agitation an exceptionally placid mother who was rarely upset by her six children Synonyms collected, composed, cool, coolheaded, equal, level, limpid, peaceful, calm, possessed, recollected, sedate, self-composed, self-possessed, serene, smooth, together, tranquil, undisturbed, unperturbed, unruffled, unshaken, untroubled, unworriedRelated Words even, even-keeled, steady, well-adjusted, well-balanced; imperturbable, nerveless, unflappable, unshakable; centered, disciplined, equable, self-contained, self-controlled; affable, breezy, devil-may-care, easygoing, happy-go-lucky, laid-back, loosey-goosey, mellow; carefree, nonchalant, unconcerned; assured, confident, self-assured; aloof, detached, dispassionate, indifferent; bovine, impassive, phlegmatic, sober, stolid; relaxed, relieved, tranquilized (also tranquillized)Near Antonyms anxious, bothered, distressed, uneasy, unquiet, unsettled, worried; jittery, jumpy, nervous, restless, skittish, tense; high-strung, unstable, uptightAntonyms agitated, discomposed, disturbed, flustered, perturbed, unglued, unhinged, unstrung, upset

2 free from storms or physical disturbance a placid lake Synonyms halcyon, hushed, lown [dialect], peaceful, calm, quiet, serene, still, stilly, tranquil, untroubledRelated Words balmy, clement, equable, gentle, mild, moderate, temperate; clear, cloudless, fair, rainless, sunny, sunshiny, windlessNear Antonyms blizzardy (also blizzardly), blustery, squally, windy; extreme, foul, intemperate, nasty, severeAntonyms agitated, angry, inclement, restless, rough, stormy, tempestuous, turbulent, unquiet, unsettled

3 free from disturbing noise or uproar a vacation in the placid lake community Synonyms arcadian, calm, hushed, peaceful, quiet, restful, serene, still, stilly, tranquilRelated Words noiseless, silent, soundless; mute, speechless, wordless; dead, motionless, quiescent; muffled, muted, quieted; dull, gentle, low, soft; ultraquietNear Antonyms crazy, tempestuous, wild; blaring, blasting, booming, earsplitting, piercing, roaring, thundering, thunderousAntonyms boisterous, clamorous, clattery, deafening, loud, noisy, raucous, rip-roaring, roistering, romping, rowdy, tumultuous, unquiet, uproarious, woolly (also wooly)