doubtlessly

She doubtlessly knows the answer to that question.

用法提示：此处 doubtlessly 作副词，修饰动词 knows，表示‘毫无疑问地’。

This painting is doubtlessly one of his finest works.

用法提示：doubtlessly 修饰整个句子，表达对陈述的肯定程度。

The team will doubtlessly win the championship this year.

用法提示：doubtlessly 置于助动词 will 之前，强调对未来事件的确定性。