His political views were profoundly shaped by his early experiences.

profoundly 是形容词 profound 的副词形式。profound 由前缀 pro-（表示"向前、彻底"）和词根 found（基础、底部）组成，本义是"深入的、彻底的"。profoundly 表示"深刻地、深远地"，强调影响的程度很深。