IPA: /ʌnˈwaɪzli/
KK: /ʌnˈwaɪzli/
In a way that shows a lack of good judgment or sense; foolishly.
He unwisely decided to invest all his savings in a risky business.
Unwisely → It is formed from "un-" (meaning not) and "wise" (from Old English "wīs", meaning knowledgeable or wise) and the suffix "-ly" (meaning in a manner). The word "unwisely" means in a manner that is not wise or lacking wisdom.
Think of 'not' ('un-') being added to 'wise' — this helps you remember that 'unwisely' means acting in a way that lacks wisdom.