unshylyadv.
Etymology: Previous versions of the OED give the stress as: unˈshyly.
the mind > emotion > courage > fearlessness > undauntedness > [adverb] > in an untimid manner
1814 Lady Lyttelton 12 Sept. Pretty [German school-]girls of all ages answering very unshyly.
This entry has not yet been fully updated (first published 1926; most recently modified version published online June 2019).