Webster's Revised Unabridged Dictionary · 1913

Maidenly

Maidenly , adjective

Like a maid; suiting a maid; maiden-like; gentle, modest, reserved.
Must you be blushing?... What a maidenly man-at-arms are you become! — Shakespeare

Maidenly , adverb

In a maidenlike manner.
Maidenly demure. — Skelton