augustly

adverb2

1. •
   In an august or awe-inspiring manner.

   • St. Mark’s is perfect. To me it soon grew to be so nobly, so augustly ugly, that it was difficult to stay away from it, even for a little while. — 1880
2. •
   In a royal or regal manner.

   • On His Majesty's arrival, the wine was respectfully presented to him, when the Sovereign sang augustly, saying: ... — 1925