penitential /ˌpɛnɪˈtɛnʃəl/adjective 1noun 1forms 3 adjective1 •Pertaining to penance or penitence.Guilt that all the penitential fires of hereafter can not cleanse. — 1819 noun1 •A book or set of rules pertaining to the Christian sacrament of penance. formspenitentials · more penitential · most penitential
