What do you mean by understanding?

It means considerate, considerate and learn to put yourself in others' shoes.

Being considerate means being able to understand each other's inner thoughts, especially when they are in a bad mood. An understanding person will make the other person feel understood and supported.

Everyone is eager to find an understanding person, a person with strong emotional ability, and let himself feel loved. If the relationship is only superficial, there is no understanding, no love, no companionship, no support and so on. That should be in the relationship, and the relationship is missing at the psychological level, then this person is lonely.