mistaken
adjective /mɪˈsteɪkən/
  /mɪˈsteɪkən/
 - [not usually before noun] mistaken (about somebody/something) wrong in your opinion or judgement
- You are completely mistaken about Jane.
 - My cab driver thought I must be mistaken about the new restaurant.
 - Unless I'm very much mistaken, that's Paul's wife over there.
 - I thought I saw someone I knew, but I must have been mistaken.
 - You are very much mistaken if you think that people will agree to these changes.
 
Oxford Collocations Dictionaryverbs- be
 - prove
 - seem
 - …
 
- badly
 - fundamentally
 - gravely
 - …
 
- about
 
 - based on a wrong opinion or bad judgement synonym misguided
- mistaken views/ideas
 - I told her my secret in the mistaken belief that I could trust her.
 
Extra ExamplesTopics Opinion and argumentc1- They hold a number of mistaken beliefs about their new neighbours.
 - That view seems mistaken.
 - He has the mistaken idea that scientists are infallible.
 
Oxford Collocations Dictionaryverbs- be
 - prove
 - seem
 - …
 
- badly
 - fundamentally
 - gravely
 - …
 
- about