impugning [im'pju:n] [ impugning ] v.责难,抨击, 对...表示怀疑 词形变化: 形容词: impugnable | 名词: impugner | 动词过去式: impugned | 动词过去分词: impugned | 动词现在分词: impugning | 动词第三人称单数: impugns |