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placid

plac·id

placid

 
pronunciation:
plae sihd
part of speech: adjective
definition: calm, smooth, or tranquil.
The wind died down and the lake became placid again.She is a quiet child with a placid temperament.
synonyms:
calm, composed, halcyon, imperturbable, peaceful, sedate, serene, smooth, still, tranquil
antonyms:
choleric, excitable, quick-tempered, roiled, short-tempered, stormy, temperamental, tempestuous, tense
similar words:
even, even-tempered, limpid, pacific, peaceable, restful, self-possessed, undisturbed, unruffled
derivations: placidly (adv.), placidity (n.), placidness (n.)