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cool (adjective)
calm and tranquil; casual, placid, serene; level-headed and unperturbed, especially in a stressful situation; composed, imperturbable, unruffled; stylish and elegant in a way that draws admiration; fashionable, hip, trendy.
calm and tranquil; casual, placid, serene; level-headed and unperturbed, especially in a stressful situation; composed, imperturbable, unruffled; stylish and elegant in a way that draws admiration; fashionable, hip, trendy.