halcyonEnglishOxford American Thesaurushalcyon adjective 1 hot, halcyon days of sunshine: serene, calm, pleasant, balmy, tranquil, peaceful, temperate, mild, quiet, gentle, placid, still, windless, stormless. ▷antonyms stormy. 2 the halcyon days of the 1960s: happy, carefree, blissful, golden, joyful, joyous, contented, idyllic, palmy; flourishing, thriving, prosperous, successful. ▷antonyms troubled.
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