adj.不切實際的；不可行的
It was impracticable to think that we could build the house in one week. 以為我們用一周的時間就能把房子蓋好，這種想法是不切實際的。
The plan is impracticable. 這個計劃是不可行的。
It was a thoroughly impracticable plan. 那是個根本無法實行的計劃。
