(n.) Sorrow for sins or faults with desire to make amends; repentance; contrition\.

Day of Atonement Yom Kippur abject apology acknowledgment anguish apology asceticism attrition breast-beating change of heart cold purgatorial fires compunction confession contriteness contrition deathbed repentance debasement degradation distress excuse fasting flagellation grief hair shirt heartfelt apology humbling humiliation lustration maceration mea culpa mortification penance penitential act penitential exercise penitently purgation purgatory qualm reformation regret regretfulness regrets remorse remorsefulness repentance rue ruefulness ruth sackcloth and ashes sadness saeta scruple self-accusation self-punishment self-reproach shame sorrow sorrowfulness wearing a hairshirt