IPA: /ʌnˈfɪtli/
KK: /ʌnˈfɪtli/
In a way that is not suitable or appropriate for a particular purpose or situation.
He unfitly dressed for the formal event, wearing shorts and a t-shirt.
Unfitly → It is formed from "un-" (meaning not) and "fit" (from Old English "fitt", meaning suitable or proper) and the suffix "-ly" (meaning in a manner). The word "unfitly" means in a manner that is not suitable or proper.
Think of 'not' ('un-') being added to 'fit' which means suitable, and then adding '-ly' to describe how something is done. This helps you remember that 'unfitly' means to do something in a way that is not suitable.