ungainable
/ˈʌŋɡeɪnəbəl/Definitions
1. adjective
Impossible to be obtained or achieved, especially because of being too difficult or expensive.
“The project’s goal was deemed unattainable due to the lack of funds.”
2. noun
Something that is unattainable or impossible to achieve.
“The unattainable dream of world peace has been a recurring theme in many speeches.”