Webster's Revised Unabridged Dictionary · 1913

Heartless

Heartless , adjective

1.
Without a heart.
You have left me heartless; mine is in your bosom. — J. Webster
2.
Destitute of courage; spiritless; despondent.
Heartless they fought, and quitted soon their ground. — Dryden
Heartless and melancholy. — W. Irwing
3.
Destitute of feeling or affection; unsympathetic; cruel.
The heartless parasites. — Byron