Source : Webster's Revised Unabridged Dictionary (1913)

Shyly \Shy"ly\, adv.
   In a shy or timid manner; not familiarly; with reserve.
   [Written also {shily}.]

Source : WordNet®

shyly
     adv : in a shy or timid or bashful manner; "he smiled shyly" [syn:
            {timidly}, {bashfully}]