der Ägypter
Egyptian
A man who has Egyptian citizenship or comes from Egypt.
Mein neuer Kollege ist Ägypter und kommt aus Kairo.
My new colleague is Egyptian and comes from Cairo.

Egyptian
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Egyptian
A man who has Egyptian citizenship or comes from Egypt.
Mein neuer Kollege ist Ägypter und kommt aus Kairo.
My new colleague is Egyptian and comes from Cairo.

'Der Ägypter' (the Egyptian) is a masculine noun of the N-declension. This means it takes the ending '-n' in the accusative, dative, and genitive singular. This is an important grammatical rule for this word.
Ich habe gestern einen Ägypter kennengelernt.
I met an Egyptian yesterday.
The word 'Ägypter' (Egyptian) is derived directly from the country name 'Ägypten' (Egypt). This pattern for forming nationality terms is very common in German.
Er kommt aus Ägypten, er ist also Ägypter.
He comes from Egypt, so he is Egyptian.
The context makes it clear whether modern or ancient Egyptians are meant. Words like 'alt' (ancient/old), 'Pharaonen' (pharaohs), 'Pyramiden' (pyramids), or use in the plural ('die Ägypter', the Egyptians) usually point to the historical people.
Die alten Ägypter entwickelten eine eigene Schrift.
The ancient Egyptians developed their own writing system.
Egyptian
'ägyptisch' and 'der Ägypter' belong to the same topic, namely Egypt. The important difference is the part of speech: 'ägyptisch' is an adjective and describes, for example, food, music, history, or language. 'der Ägypter' is a noun and means a man from Egypt or a member of the ancient Egyptian people. The words can be confused because they look very similar. A practical rule is: use 'ägyptisch' for characteristics, and 'der Ägypter' for a person.

Der Ägypter erzählte uns viel über das Leben in Kairo.
The Egyptian told us a lot about life in Cairo.
Im Restaurant probierten wir ein ägyptisches Gericht mit Reis und Gemüse.
At the restaurant, we tried an Egyptian dish with rice and vegetables.