untouchable

(noun) belongs to lowest social and ritual class in India. Synonyms: Harijan.

(adj) beyond the reach of criticism or attack or impeachment. Example: "For the first time criticism was directed at a hitherto untouchable target"- newsweek."

(adj) impossible to assail. Synonyms: unassailable.

(adj) forbidden to the touch. Example: "In most museums such articles are untouchable."

(adj) ( especially used in traditional Hindu belief of the lowest caste or castes) defiling.

(adj) not capable of being obtained. Synonyms: inaccessible, unobtainable, unprocurable. Examples: "A rare work, today almost inaccessible." "Timber is virtually unobtainable in the islands." "Untouchable resources buried deep within the earth."