名詞 untouchable:

1. belongs to lowest social and ritual class in India
   同義詞：Harijan

形容詞 untouchable:

1. beyond the reach of criticism or attack or impeachment- Newsweek
2. impossible to assail
   同義詞：unassailable
3. forbidden to the touch
4. defiling to the touch; especially used in traditional Hindu belief of the lowest caste or castes
5. not capable of being obtained
   同義詞：inaccessible, unobtainable, unprocurable