Source : Webster's Revised Unabridged Dictionary (1913)

Appealing \Ap*peal"ing\, a.
   That appeals; imploring. -- {Ap*peal"ing*ly}, adv. --
   {Ap*peal"ing*ness}, n.

Source : WordNet®

appealingly
     adv : in an appealing manner; "the table was set appealingly"
           [ant: {unappealingly}]