Found 2 items, similar to heartlessly.
English → English (WordNet) Definition: heartlessly heartlessly adv : in a heartless manner; “she behaves rather heartlessly toward her admirers”
English → English (gcide) Definition: Heartlessly Heartless \Heart"less\, a. 1. Without a heart. [1913 Webster] You have left me heartless; mine is in your bosom. --J. Webster. [1913 Webster] 2. Destitute of courage; spiritless; despondent. [1913 Webster] Heartless they fought, and quitted soon their ground. --Dryden. [1913 Webster] Heartless and melancholy. --W. Irwing. [1913 Webster] 3. Destitute of feeling or affection; unsympathetic; cruel. “The heartless parasites.” --Byron. -- Heart"less*ly, adv. -- Heart"less*ness, n. [1913 Webster]