dignifiedly

adverb

Etymology: From dignified + -ly.

in a dignified manner
“As for the mulatto waiter, after a moment more of hesitation, he took Ford's order, and walked dignifiedly away, muttering,-- "Nebber seen de like afore.”
“The morning after the perfection of the invention Simpson called upon Mr. Grampus and calmly, coldly, and dignifiedly announced that his lock was complete, and that he was now about to install it in the Grampus front door.”