This is the 4652nd most frequent German word.
unterhalten
To entertain, converse, or maintain.
In this sentence, 'unterhalten' is reflexive ('unterhalten uns') and means 'to talk or discuss with each other'.
Wir unterhalten uns über die neuesten Nachrichten.
We discuss the latest news.
Here, 'unterhalten' means 'to entertain' and describes someone providing amusement or enjoyment to others.
Sie unterhält die Gäste mit ihrer zauberhaften Stimme.
She entertains the guests with her enchanting voice.
In this context, 'unterhalten' is used metaphorically to mean 'to sustain' or 'to support oneself'.