De·mure·ly, adv. In a demure manner; soberly; gravely; -- now, commonly, with a mere show of gravity or modesty.
They . . . looked as demurely as they could; for 't was a hanging matter to laugh unseasonably. --Dryden.
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demurely
adv : in a demure manner; "the army girl, tall and demurely
pretty, threw a quick side-glance at her"