That causes great grief, anguish or distress.

The breaking of a heart; great grief, anguish or distress.

plural of heartbreaking

overwhelming mental anguish or grief, especially that caused by loss or disappointment

Someone, usually attractive, who flirts with or otherwise enamours a person, but does not reciprocate their love. / Something that causes sorrow, grief or extreme disappointment.

plural of heartbreaker

plural of heartbreak

An epithet of the professional wrestler Shawn Michaels.

(figuratively) The condition of heartbreak resulting from a failed romance.

A highly toxic herb (Gelsemium elegans), native to China, India, and southeast Asia, that yields poisons.