IPA: //ʌnˈfiːlɪŋli//
KK: /ʌnˈfiːlɪŋli/
In a way that shows no emotion or concern for others' feelings.
She spoke unfeelingly about the tragedy, showing no empathy for those affected.
Unfeelingly → It is formed from "un-" (meaning not), "feeling" (from Old English "fēlan", meaning to perceive or sense), and "-ly" (meaning in a manner of). The word "unfeelingly" means in a manner that lacks feeling or emotion.
Think of 'not' ('un-') having the ability to 'perceive' or 'sense' ('feeling') — that's why unfeelingly means to act without emotion.