untouchable
noun
plural untouchables
: someone or something that is untouchable
… so Frey moved Keith Moreland from right-field to third base and benched Ron Cey temporarily, while Green threatened to trade heretofore untouchables.—
Peter Gammons
specifically, dated, offensive
: a member of the lowest class in the traditional Hindu social hierarchy having in traditional Hindu belief the quality of defiling by contact a member of a higher caste : dalit
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Merriam-Webster unabridged



