UNOBTAINABLE
inaccessible, unobtainable, unprocurable, untouchable
(adjective) 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® 3.1
Etymology
Adjective
unobtainable (comparative more unobtainable, superlative most unobtainable)
Unable to be obtained: not able to be acquired or reached.
Synonyms
• ungettable, unprocurable
Antonyms
• See obtainable
Noun
unobtainable (plural unobtainables)
Someone or something that cannot be obtained.
Source: Wiktionary