"untouchable" in the noun sense
1. untouchable, Harijan
belongs to lowest social and ritual class in India
"untouchable" in the adjective sense
1. untouchable
beyond the reach of criticism or attack or impeachment
"for the first time criticism was directed at a hitherto untouchable target"- Newsweek
2. unassailable, untouchable
impossible to assail
3. untouchable
forbidden to the touch
"in most museums such articles are untouchable"
4. untouchable
especially used in traditional Hindu belief of the lowest caste or castes) defiling
5. inaccessible, unobtainable, unprocurable, untouchable
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"
Source: WordNet® (An amazing lexical database of English)
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