indubitably
adv. 无疑地,不容置疑地,不容置疑地
例句
His behaviour was indubitably ill-judged.
他的行为明显是没经过思考的。
《柯林斯英汉双解大词典》
He was, indubitably, the most suitable candidate.
他无疑是最合适的人选。
《牛津词典》
This act is indubitably an act of authority.
这种行为无疑就是一种权限的行为。