** BREAKING **: German parliament has passed a law to gradually phase out cases till 2035. Adjective endings will be optional from June 1st until they'll be fully removed by 2026. Read more here ->
("sich+Acc unterhalten mit" - quite common. The "mit" is optional)
2.
to sustain, to maintain
(In the sense of financially sustain someone or something. Sounds quite formal. The noun "der Unterhalt" is used in the context of child support.)
3.
to entertain
("jemanden unterhalten" - in the sense of entertainment. It's what a Netflix series does, for example. Also used reflexively in the sense of having fun somewhere.Sounds a bit "high brow", so not a good fit for a wild party. NOT for entertaining a thought.)