untouchable

(s) beyond the reach of criticism or attack or impeachment
- "for the first time criticism was directed at a hitherto untouchable target"- Newsweek
(s) impossible to assail unassailable,
(s) forbidden to the touch
- in most museums such articles are untouchable
(s) ( especially used in traditional Hindu belief of the lowest caste or castes) defiling
(s) 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
unobtainable, unprocurable, inaccessible,

Harijan unassailable unobtainable unprocurable inaccessible