The word "傻乎乎" is formed through a common Chinese morphological process where the adjective "傻" (shǎ), meaning "silly" or "foolish," is combined with the reduplicated suffix "乎乎" (hūhū). This suffix does not carry independent meaning but, when attached, transforms the base adjective into a more vivid, descriptive state, implying a manner or appearance of being somewhat foolish, often in a naive or endearing way. The structure softens the bluntness of "傻," making it less critical and more observational, and follows a standard pattern in Chinese for creating expressive, colloquial adjectives that describe a perceived quality or state.