impracticable

adj impossible to put into practice; not practicable 不能实行的: an impracticable scheme 行不通的计画.

importunity, impose, impose...on, imposing, imposingly, imposition, impossibility, impossible, impossibly, impost, impostor, imposture, impotence, impotent, impotently, impound, impoverish, impoverished, impoverishment, impracticability, impracticably, impractical, impracticality, impractically, imprecation, imprecise, imprecisely, imprecision, impregnability, impregnable, impregnably, impregnate, impresario, impress, impress...on, impressed, impression, impressionability, impressionable, impressionism,