缠绵悱恻

1. • sad beyond words (idiom)

     of a person

2. • poignant

     of music, literature etc

3. • very sentimental

Character by character

• 缠(chán)wind around
• 绵(mián)silk floss
• 悱(fěi)want to articulate one's thoughts but be unable to
• 恻(cè)sorrowful