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Use "penitentially" in a sentence
"Shuffling penitentially on your knees, bending and scraping with dustpan and brush while vicious pine needles perforate your kneecaps...it's almost enough to make you feel like Christmas might, in a twisted way, be the descendent of some sort of primitive religious festival."
"Beck has followed up 1999's electro-manic "Midnite Vultures" with a return to gloomy acoustic mode (just as he followed his antic breakthrough "Odelay" with the penitentially somber "Mutations")."
"I am not quite clear whether these articles were carried penitentially or ostentatiously; but I rather think they were displayed as articles of property, — much as Cleopatra or any other sovereign lady on the Rampage might exhibit her wealth in a pageant or procession."