Adverb
In a stiff manner.
Source: Webster's dictionaryThe task of youth is not only its own salvation but the salvation of those against whom it rebels, but in that case there must be something vital to rebel against and if the elderly stiffly refuse to put up a vigorous front of their own, it leaves the entire situation in a mist. Jane Addams
Costis bowed stiffly. "I am here to make sure that you stay in bed, Your Majesty, because if this offends you and you order me summarily executed, it is no loss. Politically speaking. Megan Whalen Turner
He now set down all the communications apparatus, rose stiffly from the chair and momentarily stood facing the misty, immobile, icebound shape of Joe Chip resting within its transparent plastic casket. Upright and silent, as it would be for the rest of eternity. Philip K. Dick
the body was rigidly erect Source: Internet
he sat bolt upright Source: Internet
his hands lay stiffly Source: Internet