Untouchable

In India's caste system, an untouchable, dalit, or achuta is a person outside of the four castes, and considered 'below' them. Untouchables include such people as leather-workers. There are various castes within untouchable, the lowest ranking generally considered to by the Bhangis.

Harijan is the polite form for untouchable coined by Mahatma Gandhi which means "Children of God" (Hari is the another name for Vishnu, Hindu God)