相关单词同义词certain, hard, 近义词 certain 确定的, sure 肯定的, absolute 绝对的, definite 明确的, indubitable 不容置疑的, undisputed 无可置辩的, unquestionable 无疑问的, indisputable 无可争辩的临近词undress, undo, undoubtedly, undoubted fact, undoubtedly true, undoubted evidence, undoubtedly advice, Undoubtedly he did it., undoubted difficulties/problems相似词undo, undocumented, undoing, undone, undreamed of, undress, undress sb with your eyes idiom, undue, 返回 undoubted