impartial ADJ. /公平的/not biased; fair. Knowing she could not be impartial about her own child, Jo refused to judge any match in which Billy was competing.
impassable ADJ. /无路可通的;没法通行/not able to be traveled or crossed. A giant redwood had fallen across the highway, blocking all four lanes: the road was impassable.
impasse N. /走投无路;僵局/predicament from which there is no escape; deadlock. In this impasse, all turned to prayer as their last hope.
impassive ADJ. /冷漠的/without feeling; imperturbable; stoical. Refusing to let the enemy see how deeply shaken he was by his capture, the prisoner kept his face impassive.
impeach V. /控告，检举;弹劾/charge with crime in office; indict. The angry congressman wanted to impeach the president for his misdeeds.
impeccable ADJ. /没有缺点/faultless. The uncrowned queen of the fashion industry, Diana was acclaimed for her impeccable taste.
impecunious ADJ. /身无分文的/without money. Though Scrooge claimed he was too impecunious to give alms, he easily could have afforded to be charitable.
impede V. /阻止;拖延/hinder; block; delay. A series of accidents impeded the launching of the space shuttle.
impediment N. /妨碍;障碍物/hindrance; stumbling-block. She had a speech impediment that prevented her speaking clearly.
impel V. /驱使/drive or force onward. A strong feeling of urgency impelled her; if she failed to finish the project right then, she knew that she would never get it done.
impenetrable ADJ. /难以进入的;难以渗透的;不可理解的/not able to be pierced or entered; beyond understanding. How could the murderer have gotten into the locked room? To Watson, the mystery, like the room, was impenetrable.
impending ADJ. /接近的;附近的/nearing; approaching. The entire country was saddened by the news of his impending death.
impenitent ADJ. /执迷不悟的/not repentant. We could see from his tough guy attitude that he was impenitent.
imperative ADJ. /及其重要，及其关键/absolutely necessary; critically important. It is imperative that you be extremely agreeable to GreatAunt Maud when she comes to tea: otherwise she might not leave you that million dollars in her will. also N.
imperceptible ADJ. /察觉不到的/unnoticeable; undetectable. Fortunately, the stain on the blouse was imperceptible after the blouse had gone through the wash.
imperial ADJ. /帝王的;皇帝的/like an emperor; related to an empire. When hotel owner Leona Helmsley appeared in ads as Queen Leona standing guard over the Palace Hotel, her critics mocked her imperial fancies.
imperious ADJ. /专横的/domineering; haughty. Jane rather liked a man to be masterful, but Mr. Rochester seemed so bent on getting his own way that he was actually imperious!
impermeable ADJ. /不能渗透的/impervious; not permitting passage through its substance. This new material is impermeable to liquids.
impertinent ADJ. /不相干的;鲁莽的/insolent; rude. His neighbors' impertinent curiosity about his lack of dates angered Ted. It was downright rude of them to ask him such personal questions.
imperturbable ADJ. /沉着冷静;平静/calm; placid; composed. In the midst of the battle, the Duke of Wellington remained imperturbable and in full command of the situation despite the hysteria and panic all around him. imperturbability, N.
Impervious ADJ. /不会被损的;不能渗透的/impenetrable; incapable of being damaged or distressed. The carpet salesman told Simone that his most expensive brand of floor covering was warranted to be impervious to ordinary wear and tear. Having read so many negative reviews of his acting, the movie star had learned to ignore them, and was now impervious to criticism.
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