adlig
noble
Belonging to the social class of the nobility; of noble origin.
Er entstammte einer alten, adligen Familie mit großem Landbesitz.
He came from an old noble family with large landholdings.

noble
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noble
Belonging to the social class of the nobility; of noble origin.
Er entstammte einer alten, adligen Familie mit großem Landbesitz.
He came from an old noble family with large landholdings.

The adjective 'adlig' (noble) is derived from the noun 'der Adel' (the nobility), which refers to the social class of the aristocracy. The ending '-ig' is a typical way to form adjectives from nouns.
In der Geschichte Europas spielte der Adel eine wichtige Rolle.
In the history of Europe, the nobility played an important role.
'Adlig' (noble) usually describes nouns related to origin and family. Typical collocations are 'eine adlige Familie' (a noble family), 'adlige Herkunft' (noble origin), or 'ein adliger Titel' (a noble title).
Sie forscht über die Geschichte ihrer adligen Vorfahren.
She is researching the history of her noble ancestors.
The term refers to the historical European noble class. Although the nobility in Germany and Austria no longer has legal privileges today, the word is still used for families with this ancestry.
Das Schloss ist seit Jahrhunderten im Besitz einer adligen Familie.
The castle has been owned by a noble family for centuries.
royal
'königlich' and 'adlig' both have to do with nobility and high birth. But 'adlig' is more general: a person or family belongs to the nobility. 'königlich' is more specific and refers to a king, a queen, or the monarchy. So not every 'adlig' person is 'königlich'. Learners may confuse the words because kings also belong to the nobility. As a simple guide: 'adlig' describes social origin, while 'königlich' describes a direct connection to the royal house.

In dem alten Roman verliebt sich Paul in eine adlige junge Frau.
In the old novel, Paul falls in love with a young noblewoman.
Der königliche Palast ist heute ein Museum für Besucher.
The royal palace is now a museum for visitors.