demurely

Concise Oxford English Dictionary © 2008 Oxford University Press:
demure /dɪˈmjʊə, dɪˈmjɔː/

▶adjective (demurer, demurest) (of a woman) reserved, modest, and shy.

– derivatives
demurely adverb,
demureness noun.

– origin ME: perh. from OFr. demoure, past part. of demourer (see demur); influenced by OFr. mur ‘grave’.