rectitude
Meaning: uprightness, extreme morality
Usage: The priest’s rectitude gave him the moral authority to counsel his parishioners.
turpitude
Meaning: depravity, moral corruption
Usage: The official’s turpitude was exposed when investigators found he had stolen public funds.
reprehensible
Meaning: deserving rebuke
Usage: The student’s reprehensible decision to copy another essay led to disciplinary action.
culpable
Meaning: deserving blame
Usage: The student was culpable for the damage after admitting that he broke the lab equipment.
penitent
Meaning: remorseful, regretful
Usage: The penitent student apologized sincerely and spent the afternoon repairing the damaged project.
complicit
Meaning: being an accomplice in a wrongful act
Usage: By hiding the answer key for his friend, Noah became complicit in the cheating.