IPA: //ʌnˈfiːzəbl//
KK: /ʌnˈfiːzəbl/
Not possible to do or achieve; impractical.
The project was deemed unfeasible due to the lack of funding.
Unfeasible → It is formed from "un-" (meaning not) and "feasible" (from Latin "facere", meaning to do or make, combined with the suffix "-able", meaning capable of). The word "unfeasible" means not capable of being done or made, indicating something that cannot be achieved or is impractical.
Think of 'not' ('un-') being added to 'capable of being done' ('feasible') — this helps you remember that 'unfeasible' means something that cannot be achieved.