Calling someone “darling” to indicate intimacy is an example of

Calling someone "darling" to indicate intimacy is an example of the relationship meaning of a message. You call someone darling if you love them or like them very much. If you describe someone as a darling, you are fond of them and think that they are nice.

Calling someone "darling"  to indicate intamacy is an example of the relationship meaning of a message.

Explanation:

Some people use the expression "darling" to refer to their significant other, their children, or someone very close to them. Therefore, when someone calls someone "darling," it is an intimate relationship that has a lot of meaning to them. It is someone they care about a lot.