The Collaborative International Dictionary
Unfeeling \Un*feel"ing\, a.
Destitute of feeling; void of sensibility; insensible; insensate.
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Without kind feelings; cruel; hard-hearted.
To each his sufferings: all are men, Condemned alike to groan; The tender for another's pain, Th' unfeeling for his own.
--Gray. [1913 Webster] -- Un*feel"ing*ly, adv. -- Un*feel"ing*ness, n.
Wiktionary
adv. In an unfeeling manner; without concern or regard for feelings.
WordNet
Usage examples of "unfeelingly".
Wessex said unfeelingly, and Koscuisko abandoned the rigged dueling pistol and went in search of revivification.
It widened as the monster unfeelingly crushed itself against the rock, and suddenly a large piece of the shoulder came away and the being twisted slushily three feet farther in.