mistaken

adjective
1
wrong in your opinion or judgement
اشتباه, غلط, نادرست, پندار اشتباه, قضاوت نادرست
2
based on a wrong opinion or bad judgement
اشتباه, نادرست, غلط, خطا, غیرصحیح
mistaken views/ideas
I told her my secret in the mistaken belief that I could trust her.
synonym misguided