What is another word for badly mistaken?
Pronunciation: [bˈadli mɪstˈe͡ɪkən] (IPA) 
The phrase "badly mistaken" refers to being completely wrong about something. There are several synonyms that can be used interchangeably, depending on the context. "Utterly wrong" can be used to describe someone who is completely off base. "Completely mistaken" and "wholly misguided" are also phrases that convey a similar idea. "Misinformed" is a less harsh way to describe someone who is incorrect because they have been given incorrect or incomplete information. "Misguided" is another word that is similar to "badly mistaken" and implies that the person has been led astray or is following an incorrect path. Regardless of the word chosen, the overarching meaning is the same - being completely incorrect about something.
