unrealizable
Definitions
Impossible to achieve, accomplish, or bring into reality.
Incapable of being represented or expressed in a concrete or tangible form.
Examples
The architect dismissed the client's request for a floating glass staircase as completely unrealizable due to structural limitations.
His dream of building a perpetual motion machine remained unrealizable despite years of dedicated research.
Synonyms
impossible unattainable impracticable unachievable infeasible unfeasible fanciful
Antonyms
achievable attainable feasible practicable possible realistic viable