impracticable
adjective uk/ɪmˈpræk.tɪ.kə.bəl/ us/ɪmˈpræk.tɪ.kə.bəl/
（行动方案、计划等）行不通的，不可行的
If a course of action, plan, etc. is impracticable, it is impossible to do in an effective way.
The changes to the tax system proved impracticable as they were impossible to enforce. 税制改革因无法实施而被证明是行不通的。
Synonyms: infeasible unfeasibleunworkable
Compare: impractical