impracticable /ɪmˈpræktɪkəbəl/ adjective /ɪmˈpræktɪkəbəl/
adjective
Learner's definition of IMPRACTICABLE
[more impracticable; most impracticable] formal
: difficult or impossible to do or use : not practicable不能实行的;行不通的 — impracticability
/ɪmˌpræktɪkəˈbɪləti/ noun [noncount]