Not available, accessible, or at hand.
Unable to be reached; inaccessible:
(Archaic) Not capable of being managed or dealt with; intractable
The definition of impractical is not useful, or is not efficient.
The definition of inaccessible is not able to be reached or not obtainable.
Not to be approached; inaccessible; aloof
Capable of happening, existing, or being true without contradicting proven facts, laws, or circumstances:
Unable to be reached
Find another word for unattainable. In this page you can discover 18 synonyms, antonyms, idiomatic expressions, and related words for unattainable, like: unrealizable, inapproachable, unavailable, unreachable, impossible, impracticable, impractical, unthinkable, unworkable, inaccessible and unapproachable.