Source : Webster's Revised Unabridged Dictionary (1913)

Surpassing \Sur*pass"ing\, a.
   Eminently excellent; exceeding others. ``With surpassing
   glory crowned.'' --Milton. -- {Sur*pass"ing*ly}, adv. --
   {Sur*pass"ing*ness}, n.

Source : WordNet®

surpassingly
     adv : to a surpassing degree; "she was a surpassingly beautiful
           woman"