[n] belongs to lowest social and ritual class in India
[adj] not capable of being obtained; "a rare work, today almost inaccessible"; "timber is virtually unobtainable in the islands"; "untouchable resources buried deep within the earth"
[adj] defiling to the touch; especially used in traditional Hindu belief of the lowest caste or castes
[adj] forbidden to the touch; "in most museums such articles are untouchable"
[adj] impossible to assail
[adj] beyond the reach of criticism or attack or impeachment; "for the first time criticism was directed at a hitherto untouchable target"- Newsweek