In the precise sense,untouchability, is the practice of banishing a undergroundcluster by separating them from the typical by social tradition or legal command. Untouchability is the practice of discriminating various individuals and groups based on their cast and the jobs done by them. Untouchability is practiced for a very long time. It works on the Indian caste system hierarchy. The untouchables typicallystandheartlessaction because they fit to the lower caste.Jatirao Fule, Shraddananda, Vivekananda, M. K. Gandhi, B. R. Ambedkar etc

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