IPA: //koʊldˈhɑːrtɪdli//
KK: /ˈkoʊldˈhɑrtɪdli/
In a way that shows a lack of compassion or kindness; without feeling or emotion.
She coldheartedly rejected his plea for help, showing no signs of sympathy.
Coldheartedly → It is formed from "cold" (from Old English "cald", meaning lacking warmth) and "heartedly" (from "heart" (from Old English "heorte", meaning the organ of emotion) combined with the adverbial suffix "-ly" (meaning in a manner of). The word describes acting in a manner that lacks warmth or compassion, as if one has a cold heart.
Think of someone who is 'lacking warmth' ('cold') and acting in a way that shows no compassion ('heartedly'). This helps you remember that 'coldheartedly' means to act without warmth or kindness.