tragic love; unrequited love; blighted love
Refers to a love that ends sadly, is not returned, or is thwarted by circumstances. Often used in literary or dramatic contexts.
Her life was a series of tragic loves.
This novel depicts the tragic love of two young people.
The two lovers' relationship ended in tragedy.
This film depicts a tragic love story set during the war.
After a tragic love affair, they ended up parting ways.
悲劇 is a general term for any tragedy, while 悲恋 narrows this specifically to a tragic or ill-fated love affair.
片思い means one-sided love that may or may not end badly, whereas 悲恋 specifically implies a love story with a sad or tragic outcome.
tragic love story; tale of tragic love
Compound of 悲 (hi, 'sad') + 恋 (ren, 'love'). The reading is on'yomi for both characters.