Source : Webster's Revised Unabridged Dictionary (1913)

Reverentially \Rev`er*en"tial*ly\, adv.
   In a reverential manner.

Source : WordNet®

reverentially
     adv : with reverence; in a reverent manner; "he gazed reverently
           at the handiwork" [syn: {reverently}] [ant: {irreverently}]