Lingering attachment or regret; reluctance to let go after a breakup, loss, or missed opportunity.
元彼に未練があって、新しい恋が始められない。
I'm still attached to my ex, so I can't start a new relationship.
あの仕事を断ったことに未練はない。
I have no regrets about turning down that job.
未練を断ち切るために、思い切って引っ越した。
I moved away decisively to cut off my lingering attachment.