IPA: /mɪsˈɡaɪdɪdli/
KK: /mɪsˈɡaɪdɪdli/
In a way that shows a lack of good judgment or understanding.
He misguidedly believed that he could finish the project in one day.
Misguidedly → It is formed from "mis-" (meaning wrongly) and "guided" (from the root "guide" which comes from Old French *guider*, meaning to lead). The suffix "-ly" (meaning in a manner) indicates the manner of the action. Thus, "misguidedly" means in a manner that is wrongly led or directed.
Think of being 'led wrongly' ('mis-' means wrongly and 'guided' means led) — that's why misguidedly means acting in a way that is not directed correctly.