Source : Webster's Revised Unabridged Dictionary (1913)

Majestical \Ma*jes"tic*al\, a.
   Majestic. --Cowley.

         An older architecture, greater, cunninger, more
         majestical.                              --M. Arnold.
   -- {Ma*jes"tic*al*ly}, adv. -- {Ma*jes"tic*al*ness}, n.

Source : WordNet®

majestically
     adv : in a majestic manner; "flamingoes walk majestically through
           the marshes"