Untouchability - It is the practise of discriminating against people on the basis of their caste. The lower castes were known as the untouchables and were prohibited from mixing with the upper castes. They lived in separate areas, had different drinking wells and were forced to do menial work. B. R. Ambedkar along with M. Gandhi fought for equal rights of the lower castes and succeeded in making untouchability a punishable offence.