相关单词近义词adj. essential, necessary, urgent反义词beseeching, 恳求似的临近词imperceptible, impenetrable, imperatives, imperatively, imperative act, imperativeness, imperative law, imperative tone, imperative a., imperative pain, imperative verb, imperative mood相似词impend, impending, impenetrable, impenitent, imperceptible, imperfect, imperfection, imperial, 返回 imperative